STS-41G

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 1

PAO Good afternoon. My name is Jim Kukowski, Public

Affairs Officer Washington, Today is a rather unusual type of
briefing, we're holding a briefing for the next mission, in the
middle of a mission. Normally we call it our T-30. Apparently,
the way our schedule is going to be running in the next year or
so, we'll be possibly doing our T-30s during the mission just
before so I hope we don't confuse too many people on the line
here about this briefing. Some notes before we begin. The 41G
OSTA-3 brochure is available outside, NRC has some brochures at
the news deck. NRC also has a film for the TV nets or video
tape, I'm not quite sure what it is, video. The viewgraphs that
we'll be using today will be available later after the briefing
here at the PIO counter. We have three individuals to brief you
today, Richard Swalin who is the Mission Planning & Analysis here
at JSC, Gary Graybeal from the Payloads Integrations Office at
JSC and Karl Doetsch, Director of the Astronaut Program at the
National Research Council of Canada. He will also be telling us
about the CANEX experiments aboard the spacecraft. We'll begin
with Mr. Swalin and he'll give you a rundown on the mission
activities. Richard.

SWALIN Good afternoon. Could I have the next chart. This

ia a pictorial of the payload bay as it will be configured Eor
41G. There are basically four major experiments in the Payload
bay. OSTA which is a pallet which contains three different
experiments, SER-B, file, and mats. Then there will be a ERBS
satellite which will be deployed and then in the aft end of tne
bay will be the large format camera, an ORS experiment, which are
both on the same structure. Go to the next one. This is
basically a description of those, or a title of those
experiments. In the crew compartment there are five experiments
that we're tracking, IMAX which is a 70 -mm camera, which is
presently flying on 41D, I believe. APE which is a Orroral
photography experiment. TLD which is thermal luminance
doscimeter, CANEX which will be talked about later and the RME
which radiation monitoring equipment. That has also been flown
before. The flight crew for this flight, the Commander will be
Robert Crippen, the Pilot will be John McBride, three Mission
Specialist, Cathy Sullivan, Sally Ride, and David Leestma and two
Payload Specialist, Paul Scully-Power who is the Navy
oceanographer and Marc Garneau, the Candian. Planned launch date
at this time is October 1, 1984. Present planned lift-off time
is 1100 GMT which is 6:00 Central daylight time. Launch window
right now for planning purposes is 15 minutes long, power levels
for the main engine throttles is 100 percent nominal. We're
flying a high inclination flight, 57 degrees, same was flown on
the first Spacelab flight, STS-9, and we'll be inserting into a
190 nautical mile circular orbit. Mission duration is planned
for 8 days 5 hours and 20 minutes. And landing sites, the
transatlantic site is Zaragoza, Spain. Weather alternate Maroon,
AOA site is Northrup, nominal end of mission will be the KSC,
with the weather alternate to Edwards. Landing time will be near

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 2

shortly afternoon at KSC and will be 11:20 here, Central daylight
time. Landing, end of mission landing, end of mission landing
opportunities, nominal end of mission, we will be landing on what
will be orbit 133 at KSC and those time there are hours after
sunrise, that happens to be 12:20 in the afternoon. And then we
have two extension days, capability into all those Continental
sites. They are all around noon time and lighting is not an
issue or a problem on this flight. These crew activity overview
is just a very brief overview. It was based on the basic CAP,
which is published at the present time, there will be some minor
changes to this when the final CAP is published but that will
give you a good understanding of the content of the flight and
how it will take place. Flight day 1 have ascent, after ascent
they will activate OSTA OFC and ORS. There will be some IMAX
photography, RMS will be checked out and then ERBS will be
checked out and deployed. Subsequent to the ERBS deploy will be
the SIR-B antenna deploy, which cannot be deployed until after
ERBS has been released. If we look at the next chart, its a
pictorial of the ERBS orbiter configuration at the appointed time
of release. Basically we will be flying very much like an
airplane, the nose of the vehicle will be along the direct flight
direction and ERBS will be above the orbiter with respect to the
Earth, we found it will be flying very much like an airplane. We
will do our set maneuver, and approximately 12 hours later the
ERBS will initiate their transfer to their operational orbit
which is 325 nautical miles. About 14 hours later, we will
initiate our maneuver down to an intermediate altitude. Go back
to the previous chart please. On flight day 2, there will be the
first operation of some of the CANEX experiments, there will be
some visual performance tests which are medical tests that are
being performed, the first doscimeter reading and we will
maneuver to our intermediate altitude. This intermediate
altitude is set up as a phasing altitude in order to reach a
specific groundtrack for the SIR-B later in the flight. We will
also perform our first ORS transfer which is transferring
hydrazine from tank 1 to tank 2. On flight day 3, we will do our
final maneuver to the SIR-B altitude that is necessary to meet
their groundtrack requirements. We will perform ORS transfer 2,
which is transferring all the hydrazine from tank 2 back to tank
1 in preparation for the EVA. We will also perform some more
medical tests and there will be the radiation monitor readings.
Flight day 4, we will again do CANEX experiments, they will start
their preparation for the EVA, they will check out the EMU's, do
the cabin prep and they will also do some IMAX photography.
Flight day 5, we presently plan to do the EVA, EVA consists of
installing what is called an ORS mod kit, which is basically
utilizing the tools and the valve systems and connections that
will be used to in the future refuel satellites. This is an
experiment to determine feasibility, refueling satellites like
LANDSAT. They will also do some IMAX photography that same
day. Crewmen performing the EVA, David Leestma is EV1, Cathy
Sullivan is EV2. Flight day 6, they will again do some

STS 41-G OVERVIEW BRIEFING IjOO PM 09/02/84 PAGE 3

doscimeter readings, they will do more IMAX photography and they
will initiate what is called ORS transfer 3/ which will be
through the valve system that was installed by the EVA crewman.
They will also do some more medical type experiments. Flight day
7, there will be ORS transfer 4, which is putting all the
hydrazine back into tank 1, which is the configuration desired
for entry. They will perform additional CANEX experiments and
IMAX photography. Flight day 8, day before entry, set aside for
IMAX photography, more doscimeter type readings, press
conference, which right now in the preliminary CAP is scheduled
for 6s 50 Central daylight time on October 8th. Also perform the
flight control system checkout in preparation for the next day's
entry. It will stow the SIR-B antenna. And they will perform
their cabin stowage, getting ready for the next day. Throughout
the whole flight, ORS, excuse me, OSTA, and large format camera
are being ground commanded to do their data takes. They will be
operating almost contineously throughout the whole flight. The
attitude of the vehicle will be basically an inverted airplane
with the nose of the vehicle on the direction of the flight in
the payload bay pointed toward the Earth, such that they can do
their Earth observation. Flight day 9, will deactivate OSTA, LFC
and ORS just prior to the deorbit or during the deorbit prep.
Deorbit burn right now is planned to take place over Australia at
10:28 Central daylight time with a landing at KSC, 11:20 Central
daylight time.

PAO Is that it. Alright thank you very much,

Richard. From the Payload Integration Office, here at JSC, Gary
Graybeal will bring us up on the Payloads. Gary why aon't you do
that right now. Gary will also have some slides to show here.

GRAYBEAL First slide. Our gain, as Richard pointed out, the

orbital refueling system, the large format camera are both
located on a mission peculiar experiments supports structure to
rig the cargo bay. We have the Earth radiation budget satellite,
which is the deployable at the next station in the cargo bay and
then farther forward the OSTA-3 which contains the maps, the file
and the SIR-B radar system. The Earth radiation budget satellite
system will weight approximately 5,000 pounds when deployed and
will leave behind in the cargo bay approximately a 110 pounds of
avionics support equipment. It's length is approximately 62
inches, it will be deployed with the RMS arm as its sitting in
the bay, they will grapple it, rotate it completely over and
rotate it 90 degrees so that the, can deploy the high-gain
antenna and the solar panels. First the crew will checkout and
deploy on the first day, well the crew will establish the
configuration for checkout and then the satellite will be
checkout from the Goddard Payload Operations Center at Goddard
through the control center here in building 30 and in the
orbiter. The solar arrays and the high gain antenna will be
deployed while its still on the arm and once those apendages are
deployed, it cannot be put back into the payload bay. It has to

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 4

be deployed at that point. The crew will then release it from
the RMS and perform a separation maneuver and following the
separation maneuver the satellite will be checkout from the
ground through the Goddard POCC. The overall objective of the
ERBS are to study the processes controlling radiation exchange
between the Sun, the Earth and the atmosphere in deep space. We
hope to establish a set of climatic models to do better long term
simoptic modeling. Lets skip the fit^re and go on to the ORS.
The Orbiter refueling system, the equipment dedicated to that
system weights approximately 1200 pounds, its combined width of
approximately 4,000 pounds of xxxxx structure and camera at the
rear of the bay. There will be 190 pound:* of hydrazine
propellant, 70 pounds in tank 1, 190 pounds in tank 2 on
launch. And then we have the EVA tools that will be stowed in
the tool box on the, where the refueling system structure. As
Richard pointed out, we have four separate propellant transfers
during the mission, three related to transferring without the
tool and one once the crew has gone out on EVA to attach the
transfer tool which will exactly simulate the LANDS AT- 4 hydrazine
transfer fixture on LANDS AT- 4 . The overall objectives of this
experiment are to do the engineering and development and
demonstrate the equipment and procedures for onorbit hydrazine
transfer. We'll demonstrate the tools needed to do this once
LANDSAT-4 decision is made to try to refuel that satellite and
develope and evaluate specific procedures for refueling future
satellites. Next slide. This is a picture of the cargo bay.
Here are the area where the tool will be applied to the orbit
refueling system and here the main camera lens for che large
format camera and the attitude reference system for that system
on the MPASS stuff. Next slide. It shows the crewman, a model
showing the crewman on orbit during EVA attaching the tools,
taking them out of the tool box and attaching them to the
structure. Next slide. OSTA-3 is the xxxx space and xxxxx
applications package, its the second package. The first one was
flown on STS-7 and it will consist of the three experiments, the
major experiment on the flight will be the SIR-B shuttle imaging
radar system. And it will be commanded from the ground, its the
total package weights approximately 5145 pounds. The maps will
have a thermal radiometer along with a 35mm camera, additional
tape recorder for bringing you the data back will postflight
process. I'm going to put up the next slide and maybe we can see
some of the... The maps is located here in the file experiment
here, the electronics radar image area here with the antenna
here. They're shown in the deployed position. The SIR-B will be
in a L-band system, that will record the data in a horizontal
flouration, horizontal transmit, horizontal receive. It will
record the reflecced data back on optical film onboard and record
it on a high data rate recorder and will be downlinked through
TDRS and brought back on high distance tape for postmission
process. The crew will initially onorbit bring the equipment up,
the centers then will be primarly commanded independent of the
crew from the ground, and the crew then periodically, you got

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 5

once a day now have agreed to change out the high data rate
recorder tapes. Maps, the objectives are to measure the
distribution of the carbon monixide in the xxxxxsphere from the
surface up to about 20 kilometers altitude and trace the
transport of this between the northern and southern
hemispheres. File will measure reflected red energy and
reflected infrared onergy, ratios of those state that data on the
visual tape recorder for postf light processing. In SIR-B we'll
obtain some (garble) radar energy of the Earth's surface in the
L-band frequencies. Next slide. The large format camera system
has the two camera systems, the main frame camera, which is a
precision aerial mapping camera and attitude reference camera
system for, during the photogremetic modeling postmission.
Physical features that again weights approximately 4,000 pounds
combined with the MPASS structural weight, the total package with
ORS approximatly 5200 pounds, the film formats will be 9 inches
by 18 inches with the 18 inch along the velocity vector with the
flight. We have a 12-inch focal length and they'll obtain
approximately 2500 frames of precision metric photography during
the mission. Primarily during nose forward payload bay to the
Efjrth and again commanded from the ground with the crew doing one
of the (garble) calibrations sequences during the mission. We're
beginning to obtain (garble) wide angle metric photography of the
Earth's surface. I believe that's it.

PAO Alright Gary, thank you very much. Before we go on

to our third briefer, we'd like to welcome a relatively large
contingent of Candian media. Bin Ganeau, that's about the extent
of my French. We'd like to also mention the fact to the Candian
media that beginning shortly before 2:30, we will be going to the
sail area for a briefing, also the MOCK-UP and trainer area in
building 9a and at the WETF, the tank facility, we'll have a
briefing there, so if you have any additional questions see
either Estelle Dorey or John McLeaish in our briefing area, so
don't get lost after this briefing. Our next briefer is from the
National Research Council of Canada, Karl Doetsch is the director
of the Astronaut Program, he'll tell us a little bit about that
and also about the CANEX experiment aboard 41G. Karl.

DOETSCH Thank you. For us the flight is important not only

from the experiments that are going to be undertaken but also
ftom the point of view that it will be the first time that a
Candian will have been in space. So before going into the
experiments I'd just like to speak a little bit about the process
that we use to select our astronauts and the overwhelming
response we had ;i fact in getting people who wanted to become-
astronauts. In July of last year, we advertised through the
media, we had 4,300 applicants for the position even though we
said they had to have all the right qualifications. It took us a
few months until December in fact to whittle them down to the six
finalists. If I could have the first chart please. And those
are the successful ones. In February, just before they started

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 6

coming onboard, we were invited to fly, not only in the late '85
mission that we had been planning for our first mission but in
October of this year. So we scurried around and decided that yes
indeed we would like to fly on that time and selected first of
all, the astronaut Marc Garneau, the Payload Specialist who will
be representing us on this flight and his backup Bob Thurst for
the mission and then wem- into the process of deciding how on
Earth we could in this very short period come up with some
experiments that were sensible, had scientific merrit and could
be undertaken by the specialist in this short time available for
training. We came up with a list of experiments which covered
areas of space technology, science and life sciences. And I'll
be going into more detail in each of these areas as we move
along. One of the constraints that we did have imposed upon us
though was that we had to work within the confines of one locker
for all the equipment that we carried onboard. One locker is 2
cubic feet. And that doesn't give you very much space, in fact
we had word from the people who design how everything packs into
a locker that this is probably one of the most challenging tasks
they've had so far. Because we've had to incorporate cassettes,
films, as well as the equipment. Next slide please. Going into
the experiments themselves, the first area that I'll deal with is
space technology. One of the experiments that was chosen at the
outset was the development of what is called a space vision
system that uses the orbiters, cameras, close-circuit television
cameras, both in the bay and also on the arm to (garble) the
position and orientation of payload, a satellite relative to the
orbiter. The sort of the environment that we see this being
useful in is in spacestation of the future. The concept has a
camera beaming on some taigets, which are located on the
satellites and then some cleaver electronics work out exactly
where the payload is, the satellite is, 30 times per second. So
this could be used for control tasks for the operator as well.
In terms of the mission itself, this time we were not able to
develope in the time available the flight hardware which would be
necessary so what we will be doing during this mission is using
hardware on the ground at Johnson, it will be in the Mission
Control Center, we'll be telemetrying the data down from the
video and actually doing the same calculations that in a couple
of years time, we'll be able to do on orbit. What we have here
is an artist impression of the ERBS release and that will be in a
poster form later. On ERBS itself, we have with tremendous
corporation from NASA, being able to fix some targets on the
satellites and it will be these targets which will allow us to
obtain the photogrametic solution. Just about in real time or at
least in as real time as we can, based on when the data will be
transmitted down from orbit for our analysis on the ground. And
we'll provide that information to the ERBS managers so that they
can confirm what their xxxxx onboard are saying. Next chart.
The next area that we're going to be looking on in this
particular mission is materials and the reaction of certain
materials, composite materials to the exposure of space. Atomic

m

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 7

oxygen interacts with some materials. There are a lot of tests
ongoing at the moment on the long-duration exposure facility
where materials will be up for 6 months. What we will be doing
on this mission is taking some of those same materials up for
just a period of one week and seeing if the changes which occur,
occur quickly at the beginning of a mission or over a longer
period. Moving on then. From that area, we go into the science
side of things. One of the areas which has cause a lot. of
curiosity to be generated since about the third mission is that
the Orbiter glows at night and there are a lot of instruments on
the Orbiter including one called a wide-angle michaelson doppler
imaging interferometer. Can't say that again. Which will be
flying in about 1988 and that will actually be measuring,
partically phenoma at nighttime of the arroral, the upper
atmosphere and we want to make sure that the design of that
instrument won't be affected at this sort of altitudes that the
Orbiter will be flying onboard, by this glow. So there are going
to be some measurements taken, onorbit to sense the glow and also
to lock at the arroral phenoma in the atmosphere and some
bioaluminous of the oceans, they glow at night. All of this type
of work will be 'one at nighttime and there will be some specific
orbital maneuvers undertaken to be able to get that
information. Special camera which has intensifies and filters
onboard will give us the information which will tell us exactly
at what wavelengths any interference will occur. Next shot.
What one of the other areas that we have a lot of interest in is
the atmosphere and looking at the composition of the various
components that go into the atmosphere or the affluence on the
Sxxxxxxx volcano for instance, a citic haze which occurs from our
factories and so on. We have a lot of lakes which are slowly
dieing in Canada and we're beginning to monitor very carefully
what occurs from ground based systems. What the orbit will
provide us on this occasion is a calibration from outside the
atmosphere of what occurs and we'll really have a super
lightmeter looking the Sun through the atmosphere and it'll give
us an idea of the constituents of the atmosphere as seen with the
Sun as a back lighter, its called a speem. Moving finally into
the area of the life science things, aspects. One of the things
that has occurred and has been noticed regularly on flights is
that the human frame, the human body does has some changes when
they first get into orbit. Some of these occur through the
vestibular dysfunctions, some the central nervous systems and
then the whole question of location of lens, feelings and lens.
These experiments will followup work that has been done by
Canadian experimenters on Spacelab and they will also lead and
reinforce some experiments which are currently plan in 1986 to
really come up with the basis of why humans change, what they
change and what we can about it. The whole series of
experiments, it will look at the vestibular system, they will
look at the general motion of the body, perpeseptive aspects of
it, the sense of feel, the linkage, reflex linkages between the
vestibular system and the eyes. Well finally then we come up

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 8

with the patch. We generated o patch for the flight, the Garneau
patch. This represents man in space in these xxxxx which can
easily be taken on. And thank you for your attention.

PAO Thank you Karl. I neglected to mention our mission

pauch which is right down here below Gary, its I think the first
time a NASA patch has had a Canadian symbol on it. A couple of
ground rules before we start the question and answers here.
We'll start here at JSC with the questions, then we'll move to
Marshall and the Cape and then come back here. If I do not know
or can't remember your full name and affiliation, please give
that for our transcript, so lets open it here for questions right
now, we'll start with Craig Colvault, AV Week.

COLVAULT Two questions, one on SIR-B and one on large format

camera. First on SIR-B. Discuss a little bit the relationship
between this radar and the one that Engle and Truly flew on STS-2
and some of the targets you'll be going for with it.

GRAYBEAL The major difference was on the one that flew on

OSTA-2, on STS-7, had one angle where the antenna could be
rotated to and therefore on this one we've fixed it so that the
antenna can rotate from 15 degrees to 59 degrees. There are some
40 investigators throughout the world that have been selected by
the science people at Headquarters for investigations, in New
Zealand, Austraila, Africa and North and South America.

PAO Hold it, okay.

COLVAULT Is it exactly the same antenna itself that's flying

a second time ....

GRAYBEAL No sir, its a complete new design, complete new

structure that will permit the science people to command from the
ground and rotate it from 15 degrees up to 59 degrees at very
xxxxx angles. It will permit them to not only get steroscopic
coverage but coverage with the phasing that Richard talk about by
the orbital mechanics for the same spot on the ground on five
different days from the different orbits.

COLVAULT Okay and on the large format camera, could you take

a second and explain how the lack of having LFC on this flight,
may if at all have affected the operation on Crippen's mission
and also secondly, I understand there are some remote targets for
the large format camera in remote areas of the Soviet Union. Has
that caused any management concern at NASA.

GRAYBEAL I'm personally not aware of any targets over the

Soviet Union for the camera, if they are, I'm not aware of it.

PAO Craig, we'll get that information for you, I know

there are a few spots, most of the targets though for the LFC are

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 9

east of 30 degrees or west of 30 degrees but I'll check that out
for you. Let's go to Mike Mecham here, U.S.A. Today.

MECHAM This will be your fastest turnaround, how confident

are you that you can meet that October 1 lift-off date and also
can you tell us what status Challenger is right now?

SWALIN I'm not really in a position to answer all that

question. As far as I know right now, its presently planned to

roll the vehicle out to the pad around the middle of the montl.

and I have not heard anything contriary to that.

MECHAM Is it in the VAB now? Is it being loaded?

SWALIN I understand it is in the VAB.

MECHAM One other question, can you describe how long is

this spacewalk and break down a little bit as to what the, which
astronaut does what.

SWALIN I believe the spacewalk is about 3 hours long.

There's only one major task and that's the installation of the
mod kit on the ORS and David Leestma will be doing that* Cathy
will be his backup. They are also doing another type experiment
in looking at the display unit that's on their EMU, They've had
trouble in the past when the Sun was shining directly on it and
their going to look at a couple of different types of displays to
determine if they could improve the visibility of that, of those
instruments .

PAO Carlos Byars, Houston Chronicle.

BYARS You're still talking about the October 1 date but

the, pretty common vord felt I think around the center that
you're looking more at the actuality is more like October 14th.
Would you comment on that and also the fact that some of these
experiments seem to be rather repetitious, we're looking here
again at things that we have heard of before, some of your
materials looking at the effect of space environment on materials
from seven different directions now. How do you justify this
sort of thing?

SWALIN I'm not in a position to answer that one. I just

don't have the knowledge to deal with that question.

BYARS You can't comment on the fact that October 14 is

considered a more likely launch date than October 1?

SWALIN Not at the present time.

BYARS

At what time can you?

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 10

SWALIN Woll the situation that I'm dealing with is I'm not

in the Mission Operation Directorate which is the organization
that is, handles the operation process. I'm from an area that's
mainly envolved with flight design. It was our, our effort is
put in the early on planning portions of the flight not the
actual operations itself. So I'm not in line to receive that
kind of information.

BYARS You just work off the given date.

PAO Carlos, manifest (garble) calls for October 1st.

If there's any changes, I'm sure we'll hear something from Mr.
Moore here,

BYARS But Kuk, we're already hearing things different,

that's the point.

PAO Well, so far as I'm concerned the official launch

date right now is October 1st. And until we hear something
different that's I'm sure where its going to be. You know how
the system operates here. Okay lets go to Jules Bergman for the
next question and then we'll come over to Paul Recer.

BERGMAN I have two questions Kuk, and probably one is for

you. I understand the original patch was designed without either
Garneau or Scully-Power on there, they were late adds. Why did
NASA add the two, well I understand Scully-Powers is now
intergrated to the U.S. and he's in the process of becoming a
U.S. citizen.

That's correct.
PAO He is a U.S. citizen.

BERGMAN He is, the biography is not, was not clear on

that. Why was, how long ago did NASA really decide to fly the
Candian and Scully-Powers?

PAO Jules the patches are made up down here and as you

know I work out of NASA headquarters and I don't know what the
answer is on that, we'll find out for you.

BERMAN Jim that's not an adequate answer.

PAO Alright....

BERGMAN I can't understand. .. the patchs were, the patch was

design without either Garneau and Scully-Powers, both of them are
fine scientists, I'm sure.

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 11

PAO Jules, Jules, do you want me to make up an

answer. I can't do that. You know that. Okay, lets go to Paul
Recer.

BERGMAN One other question.

PAO Alright, alright.

BERGMAN A t'actoral question, rather than an opinion. On

the LFC rundown, it says total weight, 5200 pounds including ORS,
why is ORS thrown in with LFC?

GRAYBEAL Because it on the same mission peculiar structure

in the cargo bay. The only reason.

PAO Paul Recer, AP,

RECER On the ORS series of questions, can you express in

volume metric terms 190 pounds of hydrazine, I mean liters,
gallons or what?

GRAYBEAL I don't have that really available, we'll get it

for you but the only, the only literature I've seen is discussed
in terms of pounds not volume.

RECER It does has volume...

GRAYBEAL Yes sir, the two canks on which we are transfering

the tank 1 on the 200 pounds or 190 pounds or over is a standard
APU fuel tank. Fuel cell tank.

RECER What force are you using to affect the transfer, I

mean pumps, pressure differential or what?

GRAYBEAL It's just pressure differential, no pumps.

RECER Okay is it the, is it a positive pressure in the

supply tank or a negative pressure in the receiving tank that is
affecting the transfer?

GRAYBEAL It's a positive on the supply tank.

RECER in both directions?

GRAYBEAL Yes sir.

PAO Excuse me Paul, go ahead.

RECER And in the event there is a leak during the process

of this transfer, what happens to the hydrazine when it moves
into free space with a spacewalker nearby?

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 12

GRAYBEAL There will be no transfers while any of the crew is

out in the bay.

RECER

Okay,

GRAYBEAL We had designed the system so that its, there is a

minimum of two valves, we provide a safety situation that we'd
have to have a double failure before any leakage could occur.
Should it occur, it will become small frozen ice flakes, those
would if that occurred and got on into the insulation or on the
crew suit they could sublimate those all with the scent and we
have looked at a procedure, contingency procedure for baking out
the hydrazine, it will sublimate off.

RECER You would expect no damage to materials that it

would come into. . .

GRAYBEAL They have tested that at White Sands and there have

been no damage to any of the suit materials, where they have
injected hydrazine directly onto the materials under high
pressure .

PAO Alright this lady here, state your name and

affiliation.

Rosemary Lamb, Cnicago Tribune. I'd like to
clarify the role of Cathy Sullivan, please. You said she was a
backup to David Leestma, does that mean she will not be doing EVA
unless Leestma cannot, and if she is going to be doing it anyway,
what exactly will she be doing?

SWALIN She's an observer, she will be going EVA, but she

will be basically observing what Leestma is doing.

LAMB

observing?

Sorry, could I follow that up, what will she be

SWALIN She will be basically watching his activity, and I

don't know of the specifics of her activity other than that.

LAMB
SWALIN
LAMB
PAO

Will she have an MMU?

No, they will not be flying an MMU on this flight.
Thank you.

Okay, Wallace, right there, that's it.

Wallace (garble) Toronto. Do I understand that all
of Marc Garneau's work on this mission will be self-contained, in
other words, he is only working oh Candian experiments, or will

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 13

he be assisting other people at times when the Candian
experiments are not there to run?

DOETSCH I can address that. During the ERBS deploy

sequence or just prior to the deploy, he will infact be operating
the Orbiter's close circuit television camera, so in that sense
he has a role during that portion. All the other parts of the
plan which had been identified by NASA for the mission will be
undertaken by the NASA Mission Specialist and Pilots, there will
be some assistence provided by other crewmembers to Garneau in
carrying out some of his experiments.

PAO Mr. McCall from Reader's Digest. Malcome.

MCCALL Yes, this is a question I guess for the whole

panel, concerning the addition of two crewmembers bringing it up
to a record number of eight crewmembers, How did this impact on
the safety contingency and general housekeeping, eating, sleeping
cycles, the record number of eight crewmembers?

PAO Richard, you want to (garble) on that.

SWALIN There are seven crewmembers, with regard to

housekeeping activities, I have not been involved in any of that
from the standpoint of capability, to support that many crewmen,
the vehicle has always been designed to support 10, or 7 excuse
me. So that's within its design capability. And they won't have
shift sleeping and meals etc, it'll all be done as a group?

SWALIN That's correct.

MCCALL And the safety contingency, there's no, there's no

impact there at all?

SWALIN None that I'm aware of.

PAO Craig Colvault and we'll go to Marshall for the

question following Mr. Colvaults.

COLVAULT Karl, on this speem atmospheric instrument. As you

know over the last couple of years there's been a debate between
Canada and the U.S. on acid rain and you brought that up in your
comment on the lakes. Is it plausible that some of the data from
speem could help Canada in its discussion with the United States
on acid rain and dying lakes in Canada.

DOETSCH Well I wouldn't like to comment on how the

discussion between the United States and Canada would go, but
certainly what the instrument will provide is a quantitive
measure of the extent of acidic hazes in the upper atmosphere
from ground based measurements. To some extent there is some

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 14

absolute measurements being taken in space which can't be taken
on a... so it will provide a absolute calibration, it would be
very useful.

COLVAULT From that instrument capability, will you have a

localized capability with the instrument to look down across the
few hundred square miles of territory say alone the north eastern
boarder areas of Canada and the United States.

DOETSCH Not from space. From space its an integration of

what the lim, the atmosphere lim sees, but from the ground, very
dif fently.

PAO Alright, we're going to move to Marshall Space

Flight Center now, following that we'll go to the Cape and then
we'll come back here for some more questions, so lets go to
Marshall .

Dave Dooling, with the Huntsville Times. We have
several questions. First off, I was left a little bit confused
on the hardware heritage on the SIR-B radar. Is the whole thing
a new build? I had understood earlier that the antenna and the
electronics at least were being carried over from SIR-A,

GRAYBEAL The antenna is a complete new build, the

electronics are basically the same with the exception that we are
onboard this flight recording the data on a high data rate
recorder. It was not, most of the data was recorded on the
optical film recorder on the first mission.

DOOLING Okay, how much, do you know how much overlap there

will be between the targets foi the SIR-B and the large format
camera. I know that the two can't view the same things
simultaneously but day to day will there be any overlap between
their targets.

GRAYBEAL Very little.

DOOLING Okay, in, with regards to the large format camera,

how difficult was it in accommodating it in the schedule for the
mission. Was it minimal impact or did it take a bit of juggling?

GRAYBEAL For 18 months now its been scheduled for this

flight, it was scheduled for, originally 4D when it was...

DOOLING Will the photos that Scully-Power takes be released

after the mission, I've heard that some mot ionagraphic photos
taken on STS-8 were yanked by the Navy.

PAO I can't answer it, that's one of those other

questions, I'll try to get an answer for you.

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 15

DOOLING Okay, for Karl. Would you give me a little bit

more detail on the arroral and atmospheric experiments, excuse
me, the glow and atmospheric experiments. On the glow camera, it
looks like a military starlight scope that you're mounting on the
front end of the camera. Is it that type of instrument?

DOETSCH The image intensify that you saw on the viewgraph

is one which is being provided by NASA as part of a general
program that they have. There is a coinvestigator , Dr. Mandez,
on this particular experiment and they are, our principal
investigator Dr. Kendall and Dr. Mendez are cooperating on
this. The image intensifier intensifies the wavelength and the
ultraviolet range and it will be used to basically fine out how
much energy there is in the atmosphere at nighttime and also
twight, under twight conditions, which will then give the
information we're looking for.

DOOLING Will it give you any spectral data or is it

strickly imaging?

DOETSCH No, it will give spectral data. There will be 11

different filters carried onboard in order to be able to give the
spectral discrimation that's required.

DOOLING Okay, will the same instrument be used in Steve

Mendez 's arroral photography experiment?

DOETSCH There is some sharing of instruments, yes.

DOOLING Okay, and the name that you have used for the

atmospheric experiment. Would you spell that out, its a little
unclear coming down here, and is that an acroymn?

DOETSCH It is an acroymn. The acroymn is SPEAM. SPEAM

which stands for Sun Photometer Earth Atmosphere Measurements.

DOOLING Okay and did I understand, did I interrupt the

diagram correctly, is that going to be mounted on the side hatch
window?

DOETSCH That is correct, it will be for the basic

calibrations when its looking directly at the Sun, it will be at
the high side hatch window which allows the UV transmission. A
lot of the measurements will be done out of that particular
window but there i3 a capability of using other Orbiter windows,
just losing the spectral content of the filter characteristics of
that window.

DOOLING Okay, thank you.

STS 41-0 OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 16

Paul Scull Y -PoSer ri he^ D a V couDir^ d ^ d ?H 0ne Uem here ' ^^ing to
observation information and photSarS^- ??°* • He Said that his
or defense purposes, he willbe ?2ifS?« 1J' 13 not for mi litary
don't know when and I can't tell ™n ^ 9 " hOSe : 1 don,t ' 1
carry a two and a quarte? sautrt fnrm^ many P^tures. He does
he will be taping his visuf? 2Jf J ? at Camera with him and also
know, but I'll, maybe we can «E e ^atxons. That's as much as I

from the Cape, tMfLlo^a^os'^The^^Lf ° Ut ■ that ' 0ka ^
to move to the VAB Tuesday slrSl^J- ha * len 9 er *s scheduled
the pad on Septembe 9th and our ?au^ S^t-f^ af ^ r , t0morrow ' t0
October 1st. We also have a nnL \?*: e scn eduled for
fully deployed to 100 percent wh^h - the OSTA-1 has been

we'll go to y the Cape^nTnow foTques^ns?' 103 feet ' ° kay <

Tippsion, lowa? kay ' We h3Ve T ° m Boyle from ^PP^on Conservative,

pretty close to e dawi r here t in a Fl 1 or?S time ,2 f 0700 that c ™°*
whether daylight wi^^J^^^^^^ 1^?^%™

oocir 1 " but it wln"Ce :fUr e H?t t ^f Wh T.° rbUal SUnrise ""1
for a launch time thJt^i.^ri 1 ^ ^^^J^P'-Jjntly Panning

No more questions.
he?e. ° kay ' thank y° u ' We 'H come back here. This lady

know more abouf Jhl, ^hfcand' ia^ 9 ^ 3 " Press " X ' d ^ to
categorize them all as for ult n . eXperiments ' whether its fair to
Earth other than perhaps the fcid rafff ' ra ? her than life on
tell us how much the shut til SSsts in th^^f^* u And could ^
Candian financial contribution t«\i2 Candi an share of, the
American's will help clrnean vZ the P r ° 9ram and which
American's assist ZVrnt^s If^ni**" ^ "° the
DOETSCH x missed the lagt one<

^arneau experiments™ aatronaut s that are helping the
DOETSCH Okav r ne) . H T i

terms of who is heipinS who iTxtJIl Cely in NASA ' S ha ^ m
be assisting during thl'exnpr fLn S ! IStin ?r Paul Scully-Power will
experiments? SotThaS a s^bieSt and the " fe »cien«

scence work. We perfeTthl ca^^1o^^^^1^ o ro^^ P a S c n ; t t^no^og e y,

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 17

space science, and life science and each of those are important
elements which draw upon different disciplines and have different
principal investigators involve, so we would like to continue
with each of these thrusts into the future.

O'NEAL Would you try and make a distinction between work

that is mainly designed for life in space, the space station and
the shuttle missions as opposed to something that could be
applied on Earth. See what I mean?

DOETSCH Well very diffently, the work which is being

undertaken under these space adapt syndrome work. That looks
very clearly at the adaptation of human beings to the space
environment. And it looks very carefully at how the lack of
gravity as an example effects their responses, so yes it will
have a, well we hope it will have a significant impact on the
future life in space. Because the shuttle missions are
relatively short, a 7 day duration, they can't tackle the long
duration problems but certainly it will address the initial
adaptation process.

PAO Okay, Christine.

Christine Spenser with the (garble) Citizen.

SPENSER Karl, what's the role that the other Candian

astronauts, specifically the backup Bob Thrust, but the others as
well will have during the flight, will they be here? What will
they be doing, where will they be?

DOETSCH The other five will be scattered throughout the

United States. At Kennedy and at Johnson. In Bob Thrust's case,
he will very clearly be involved here with us. He is being
intentionally involved with the whole training program now for
two months down here and he will be our point of contact through
the Candian program of the astronauts.

SPENSER Could you be more specific, will he have an actual

role with the astronauts in space dealing with Marc Garneau or
talking to him at all, or is he essentially here as a liason with
the press and the other Candians here?

DOETSCH He will not be communicating directly with Garneau

in space. That is a role of CAPCOM, however, when the Candian
principal investigators have certain aspects that they would like
to bring to the attention of flight control, Bob will be involved
in turning the language into the appropriate language for passing
our messages on.

PAO For Ms. O'Neal, you asked about some costs and

things, we're having, we have an agreement of course with the
Candian government, the activities here are in recognition of the

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 18

fact that the RMS or Canada arm as you Canadians perfer to call
it was built by your people and given to the space transportation
system here. There maybe, there will be an admendment to cover
some of these other changes to the MOU and a lot of these
experiments are really precursers as Karl said to the next flight
coming up in 1986. Let's see we have some more questions here.
This gentlemen back here in the blue suit.

Michael Burns CJOH Elevation. Because the first
Canadian mission was moved up from the late 19 35 to October 1, is
there any concern among NASA officials that there may not have
been enough time to train Marc Garneau, or has there been enough
time?

PAO I think the training is... they wouldn't fly if he

wasn't completely trained. There is, of course certain things
that they have to carry out, but I imagine tomorrow you can ask
Commander Crippen, how he feels about the training that's going
on for both Garneau and Scully-Powers. Mike Mecham.

MECHAM We've learned more about software perhaps than we

ever wanted to know on this mission. How is the software coming
for the 41G mission?

SWALIN As far as I know today, its coming fine.

MECHAM So you will be on, do you know when for instance

that kind of stuff gets delivered to the Cape and the run
throughs of it so it can be tested prior to lift-off?

SWALIN I don't remember the specific dates that that

software, that the software for 41G will be delivered but its in,
I believe in the 2 to 3 weeks prior to launch timeframe.

MECHAM Which means its delivered earlier than it was for

41D, I believe that only arrived about a week before.

SWALIN Yes, but D was a remanifest and two sets of

software were blended together. f

MECHAM Are you, is this software more new and improved

software that seems to cause trouble?

SWALIN I'm not sure I know how to answer that. The basic

software is the same, I mean, there's obviously refinements going
on to that, continuously as we better understand the systems, but
I wouldn't say its new as such.

MECHAM So there's, other than the fact that you've

obviously got to change things because you're going into 57
degrees and that kind of stuff, its a basic shuttle software
program, they're not devising new safety procedures and whatever

STS 41-G OVERVIEW BRIEFING 1:00 PM 09/02/84 PAGE 19

in it. At this time they were talking about, there were constant
concerns about glitches over various safety procedures that they
had written into the software, is that not going to be attempted
on this mission?

SWALIN I'm not sure, I don't know the answer to that.

PAO We have time for about one or two more questions,

maybe one at the most, we have to, we have a Hawaii pass coming
up in just a few minutes. So lets start with this lady right
here.

Pat James, with the National Space Institute. My
question is about the medical experiments being carried. Can you
tell me whether these derived soley out of what was learned from
Spacelab or are you working in colaboration with the biomedical
unit that's being established here?

DOETSCH Yes, certainly, the work is cooperative work with

the biomedical unit here, the activity which has been ongoing
both in terms of Dr. Watt who is the principal investigator from
Canada and Dr. Munny, one of our astronauts has been ongoing for
a number of years. What Spacelab provided was some new insights
and some new stimulation for some of the activity that will be
going on on this mission. But there will be some of the basic
longer term work carried out as well.

PAO One more question, this lady right here. Wait for

the microphone.

Ellie Tescher from the Toronto Star, Toronto. With
regard to Julie O'Neal's question about costs, I'm afraid I don't
understand and could you expand upon there will be an admenment
to cover other changes, I don't know what that means.

PAO An admenment to the memorandum of understanding

that the United States, NASA has within our seat. We could talk
about that after the press conference here. It's time that we
have to end, we have to turn the satellite back to operation, so
thank you ladies and gentlemen very much.

END OF TAPE

* STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 1

PAO Okay, good afternoon and welcome to our post flight press
conference for the crew of Shuttle mission 41G. And without any
further delay I'll turn it over to Commander Bob Crippen.

CRIPPEN Thank you very much. Appreciate your joining us this
afternoon. We're sitting out another first as far as 41G is
concerned in that I believe, this is rapidly as we've turned
around a post flight press conference having just landed last
Saturday. As a result of that, we are not going to have any of
our movies to share with you because it was impossible to get it
all processed and ready in time. Consequently, we are going to
share the flight with you through some slides. We were here just
a little over a month ago and I think you know everybody that's
to my right here: the pilot of the mission, Jon McBride; to his
right, Kathy Sullivan, Mission Specialist; to her right, Mission
Specialist, Sally Ride* and to her right, Mission Specialist,
Dave Leestma; and our two Payload Specialists, Canadian Marc
Garneau, and Oceanographer Paul Scully-Power. We had what I
consider a fantastic flight. It had its little bumps, but I
think if it did any thing, it underscored that having people
involved did make the difference between a failure and a success,
and I personally consider this mission a success in every way and
mainly because of that. What I'd like to do today is, as I Maid,
use our slides to give you our view point of the flight so
without any further ado, why don't we see if we can go ahead and
project the slides, please. I'm not sure how all this is going
to work, but we'll find out. Okay that's fairly obvious, the
mission patch. Why don't we go ahead and go over the next one.
Could we have the next slide, please?

It's behind you, Crip.

CRIPPEN Ahh, oh. It's not catching up with it on the TV,

that's what's confusing. Jon?

MCBRIDE Let me tell you a little bit about the ascent. I

guess for the five of us on board who had never done this before,
I'm sure down to the last one of us, it was probably the most
exciting thing that's ever happened. Just to sit on top of that
six million pounds of thrust or something to something, you just
really can't describe to people down here. It was exhilarating,
just to feel all that force, the dynamics, the power, and the
thrust. And, I understand, it was probably more spectacular to
the people down here watching it because of the tightly scattered
deck that we went through as we entered the ascent phase of our
flight. The twilight lighting really here that it made it
spectacular for you also. That's one of the shots, I believe,
was taken from our Shuttle training aircraft over the Cape that
was flying the weather flight for us pre launch. Very
spectacular view. Next slide.

* STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 2

CRIPPEN This is the group that we just introduced to prove

that we can get seven people all tucked away in the vehicle. It
was crowded, but as I said in the in-flight press conference, it
was certainly do-able. We had to establish certain ground rules
about who could be where when. And be very careful about things
like crash management and whatever. But as I've told our
management here, we can certainly fly seven people. I would not
recommend eight without worrying about or having something like a
Spacelab volume to go ahead and absorb the other people because
seven people is crowded. Next slide.

SULLIVAN Well, we started off on flight day one with

deployment of the ERBS Satellite, and we got going on this right
away. About four hours into the flight, Dave and I did a check
out of the arm just to make sure that it was working. And then
Dave actually went in and grappled the satellite. This gives you
sort of a good overview of the pay load bay that you will be
hearing more about later and it also shows you the ERBS
satellites with its solar panels. Right now in the bay, the
solar panels are all folded up; the experiments are sitting on
topj and the arm is actually grappled to the satellite. How
about the next slide? This is what it looked like after a lot of
trouble. About four hours later when we finally got the arrays
deployed. And those of you that followed the flight, knew that
we had a very nominal unberthing of the satellite with the arm.
They had a few problems on the ground with the check-out of the
satellite. But then when it came time to deploy the appendages,
deploy the solar panels, and the spherical antenna that you see
deployed in this picture, we suddenly ran into a problem. I went
back to the aft white deck and threw the switch that was suppose
to deploy the first solar panel and nothing happened. And I
threw the switch again, and nothing happened. I finally got up
the nerve to call down to the ground and tell them nothing
happened. But they already knew that nothing had happened. So
we spent, I guess, two more revs solving the various problems.
It turned out to be a thermal problem and there was a lot of good
work by the people down here on the ground to figure out exactly
what was wrong. We used a combination of rotating the satellite
to get some heat on the panel and using the arm to shake the
satellite around to try an shake the solar panel loose, and that
worked. Once we got the first one out, the second one was easy
to get out. We had no problems and no reason to use the arm and
then the antenna followed right after that. We went smoothly
from there into a deploy. And although it was late in the day,
we were probably the second happiest people - second to the
makers of the satellite, to finally be rid of it. Can we have
the next slide?

The rest of our cargo bay, of course, was filled with things
that we devoted a lot of effort to as well, and you see one of
them here in the foreground, unfolding itself. We opened up the
SIR-B antenna, the radar antenna for the Shuttle Imaging Radar
experiment, very shortly after releasing ERBS on flight day one,
so that that group of experimenters could begin collecting data

* STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 3

right away. And with the exception of closing the antenna when
we needed to do orbit adjust burns with the orbital maneuvering
system engine, we left the antenna open and the radar running
virtually continuously through the remainder of the flight. The
antenna mechanism is a pretty complex one that gave us a few
surprises on day one, primarily due to the way the springs that
act on some of the hinges had been rigged before launch. Once we
got through those initial hurtles and surprises though, it was a
fairly well behaved system. We had a few problems on the
closure of the antenna that you probably heard some about, if you
followed the mission. At one point we needed to push down with
the remote manipulator system to let some latches close and snug
the antenna back down into the payload bay. And then later on we
ended using a redundant motor to help close this outer leaf that
you see moving here, close it a little more smartly so that those
latches would be captured by the claw. And on EVA day as we will
show you a little later, we went out to inspect the antenna just
to make sure that our assessment of it from on board was correct.
If I could have the next slide, I'd like to tell you a little
more about some of the other experiments that were oriented
towards Earth sciences that we carried in the bay. Looking
beyond the radar antenna which you see on the left here, at the
back of the bay, on a bridge work structure, was a large format
camera. This is basically a very, an overgrown version of the
high resolution mapping cameras that are commonly carried aboard
survey aircraft. It takes photos on a nine inch by eighteen inch
frame of film. And pointing off to the left, over the starboard
side of the Orbiter, has two stellar cameras that take star field
pictures coincident with each Earth picture so that the
investigators can really refine the pointing and determine where
they were looking on the ground. Dave will be telling you
shortly about the rest of the hardware back on that structure.
Large format camera operated fairly autonomously from our point
of view with the exception of the one day that we did a stellar
calibration aiming all three of its optical axes to deep space so
that the investigator would get a good definition of how well
aligned all of his cameras were. The next picture, if we can
have that up, will show you the other two major experiments that
were members of the OSTA-3 or Office of Space and Terrestial
Applications science package onboard. The forward one here with
the four view ports on it, was the file experiment. And that
acronym stands for future identification and location experiment.
It's basically a digital Earth sensor that is designed to try to
make satellites, such as, Landsat smarter than they currently
are, such that there onboard resources like tape recorder footage
can be better managed remotely and enhance there ability to view
selective targets rather than just indiscriminately turning on
and taking data over cloudy portions of the Earth for instance.
The experiment behind it with the larger camera port up above is
the MAPS experiment, measurement of air pollution from Shuttle,
and that's a two chamber radiometer that was designed to look at
carbon monoxide in the upper levels of the Earth's atmosphere.
Both of these experiments had flown on STS-2 back in 1981 with
some... each of them with some problems and so they were looking

* STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 4

forward to a reflight to higher latitudes and for a longer
duration on our flight. Words from them so far that they all got
a very good amount of data and are eagerly awaiting all their
tapes and so forth back at their labs so they can begin to jump
into it and do their analysis, but they again were sort of
background experiments that just operated through the duration of
the flight. Controlled by onboard software sequences. And the
next slide please.- Those software sequences were a chore that we
all took a good hand in keeping tabs on. We loaded over a
hundred of them for one particular version of the radar
operations. The large format camera and file and maps ran off
single sequences that we started the first day of the mission
and terminated the file day of the mission. And this is just a
shot of me on the aft flight deck vith one of our flight plans in
my hand and. some of the pads of paper clipped around the wall
that we used to keep track of when we needed to set up sequences
for the investigators and let them get some data. Next slide
please. A key element of the success of the Shuttle radar
experiment and one that became even more central when we
experienced problems with the Orbiters Ku-band antenna was a high
data rate recorder, similar, exactly the same, in fact, as ones
that had flown on the Spacelabs missions and you see that on your
right here. This is one of the occasions in which Sally was
getting ready to change out the tape reel for us. And this was
an interesting story how this recorder ended up manifested on the
flight in the first place, and everyone is very grateful now that
they succeeded in getting it aboard because it really provided
them some of the best digital data they could obtain once they
got into problems with the TDRS system. It was a fairly loud
recorder, and we had an interesting event on day one as Crip and
I raided lockers to pull out phone pads and tried to tape them
on the top of the recorder and silence it a little bit since
three of us were planning to sleep on the flight deck. And the
next slide please ....

Ahh, there's a picture of your trusty pilot in the bag again.
That's our IMAX bag that we used to change film. The canisters
of film, I think, weigh somewheres around. . .well each roll of
film was a thousand feet and it last... gives you about three
minutes of coverage up there. And it was my duty on order to
change these rolls of films. We had two magazines that we
alternated in starting on the IMAX camera. This is a shot of me
in the brag of transferring one canister of film from the
magazine and into its can for return to Houston, being exposed
and loading up another can of film into the magazine to be put
back on the camera. We referred to Mr. Backs as probably one of
the... he was very nearly to the eighth crew member. We had to
kind of baby sit him during most of the flight. I think the
camera weighs 65 pounds, or something. It's a huge piece of
machinery. Sort of like toting a dog around with you most of the
flight. Very interesting piece and we haven't seen the IMAX
films, yet, but we hopefully got some good coverage for the IMAX
people.

CRIPPEN

I was going to say that this is the third flight

» STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 5

that we have flown that camera on and that they are going to be
producing a film from it that will be shown in the IMAX theaters
that, I think, everybody will find very interesting. Next
slide. That's a shot that shows you just about how much
photography or photographic equipment we had onboard. We were
really loaded down with it. We had, I think, just for
photographs of the Earth and cabin, interior of the cabin, two 35
millimeter cameras. We had two 70' s dedicated for out the window
pictures. We also had a 16 millimeter camera for in and outdoor
shots. We had a len off camera with 180 shots on each magazine
for out the window viewing... panoramic type scenery. We had
two magazines of those, I think with 180 films on each one of
them. And 10 rolls of the IMAX film with a thousand feet of that
on each one of those rolls. So we were quite busy with the
photographic requirements during the flight. And we've seen some
initial developments of our film that we took and they are very
interesting as far as we are concerned. I think they are going
to be worthwhile and full of data for the scientist also. Next
one. I spent quite a bit of my time at the windows and some of
this time at the windows was involved in pointing various
apparatus out it. Some of it involved pointing a camera with an
mtensifier and various filters were slits and gratings on it to
look at Orbiter glow and aurora and air glow in general. And
this particular experiment, I'm doing either a sunset or just
taking measurement of solar radiation during daytime and holding
a photometer and pointing it at the side hatch window. Next
slide please. And another portion of my experiments up there
involved doing some life sciences. Here I'm just sitting besides
Paul Scully-Power whose having one of his cat naps, and actually
he is sort of in a calculated pause between experiments. And
Paul was very helpful acting both as a subject and also recording
data when I was a subject in a series of life science experiments
to be carried out on the mid-deck. Next slide, please.

SCULLY-POWER I warned Marc during the flight that he was

going to use me as a subject. I'd totally passed all the
Canadian data, but he still persisted. I think we threw this
slide m just to show you it wouldn't be an oceanographer without
a shot... we can go on to the next slide. Our next slide shows a
picture. . .telephotograph. . .of the ocean. You are not looking at
cloud there. You are looking totally at the ocean in the sun
glitter pattern. In other words, you look into the suns
reflection on the ocean, and what that does for you, it
highlights, for you, the dynamics of the ocean. That particular
photograph is taken in the central Mediterranean. That little
piece of land to the right is the coastline ... the northern
coastline of Libya there. And I think what it tends to
show... just have to look at that... that one of... it's not a sort
of unusual example like we probably took several tins of
photographs like that, but the one message we got from looking at
the ocean from space is that it's a far more complex dynamic
system than we ever expected. And just to show you sort of
progression that we are doing in this oceanography from space was
back in 1981, when John Young flew the STS-1, that we saw these

» STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 6

small features that you see in the center of that frame... they
are called spiral eddies, The dimension there... they are about 8
nautical miles across those spiral eddies. The oceanographers
first became aware that they even existed as I say, in 1981.
Between then and now, we have had several crews come back and
shown us isolated examples of these little spiral eddies, but
what came out of this particular flight was that we were able
to see that this sort of structure is interconnected for
thousands of miles. In other words, the whole of the
Mediterranean looks like this if you look at it the right way.
And so I think this is starting a whole new look at the dynamical
situation in the ocean and how energy is transferred from small
scale to large scale and back again, and, of course, how that
interacts with the atmosphere. So I think we got some really
good results there. Next slide please. And just one more on the
oceanography. What you are looking at there, the headland right
at the trp is Gibraltar and the bottom is the coast of Morroco,
and so you are looking at the Strait of Gibraltar there. And the
water is the western Mediterranean. The occult feature that you
can see coming right a round there turns out to be a series of
internal waves in the ocean, which again, this is taken in the
sun glitter so it sort of perturbs and serves as texture of the
ocean enough so that we can see it. And there is probably
somewheres between 12 and 15 waves in that packet. The leading
one of which is the strongest. And what's causing that is the
tidal pulsing through the Strait of Gibraltar. So it's not as
though the water comes through in a turbulent structure. It
comes through in that tidal pulse and has a wave train associated
with it. And there has been some recent theoretical work to
discuss that, but I think this is the first time that we've ever
captured it on film with high enough resolution to show that the
multiple wave trains and this is just one more example of some of
the new things we've got in oceanography on this slide. Next
slide please.

GARNEAU We carried lots of experiments on the mid-deck as

well. This is a s.Ude of me operating a Hungarian dosimeter.
We, NASA, went into collaboration with a group from Hungary to
fly a set of six dosimeters and a dosimeter readout so that we
could get realtime readouts. That experiment worked very well
and the first reports are that it correlated very well with the
U.S. dosimeters that were carried. So that was very successful
experiment. We also carried two other radiation monitoring
experiments onboard the mid-deck. And we carried an auroral
photographic experiment which was designed to take pictures of
the auroras. Since we were flying at high latitudes, they, the
group, wanted us to try and first of all look out the Shuttle
windows when we were at the southern most part of our orbit just
to see if we could see the auroras to the south. And we could.
We could see brillant green auroras. And secondly, to try and
take pictures of it with the camera that they provided and the
image intensifier and several different filters. And we are
hoping for good results from that. Next slide please.

. STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 7

LEESTMA The final payload that we carried in the payload bay

was the Orbiter refueling system or ORS. And it was identified
with the big American flag and the little logo on the front of it
that it was made by the Technical Services Division here at
JSC. In fact, this entire payload was built ,. .designed and built
here at the Johnson Space Center. It was designed to show that
we could transfer hydrazine fuel from one tank to another as if
we were refueling a satellite. And we did that five times that
we were on orbit. We made five distinct transfers. Next
slide. And the way we did that was inside the cockpit using a
small keyboard display unit, which you can see at my left there,
and used our check list to transfer the fuel. We'd send our
commands out from that, keyboard display unit through the
scattered switch panel in the back and out to the micro computer
on the orbiter refueling self . .orbiter refueling system itself,
which would actually do the commanding on the payload. So this
is the first payload that we've carried that used extensively its
own micro computer to handle its own processing. And then we get
our face back and get the data back through our own general
purpose computers so that we could use that for fault data
annunciation and watching the transfers in progress. We did a
blow down transfer to start with, and then we started doing
pressurized transfers. The second half of the demonstration not
only was to transfer fuel but was to go EVA and make connections
up as if we were... the ports on the Orbiter refue?ing system were
designed just like a Landsat-type spacecraft. And we were to
make connections up using special tools. To make a connection
like we would refuel it and then come back in in the next day
actually flow hydrazine through those lines and transfer fuel
from one tank to another through those lines. Next. And this
was Kathy and I getting ready for our EVA to do that task the
next day. We were getting ready to get our suits on, putting the
anti-fog on our helmets, and getting ready to get into the
airlock, but on our suits and go out the door with a lot of help
from Jon, who was our IV support person. Next. We finally got
into our suits and this is waving goodbye to Jon as he is
shutting the inter air lock hatch as we prepare to finish our
prebreathing and then depressurize the airlock and go out the
airlock. Next. And there we are working back on the ORS. I'm
in the foot restraints and had my back to most of the cameras
most of the time because all the activity was right in front of
my face there. Which I understand you got some good pictures
down through the RMS cameras that Sally was operating the whole
time which proved very worthwhile because during our dark passes
she used the RMS light to illuminate the area. And Kathy was up
supporting me on the left side of the ORS and we finished that
task on time and everything worked very very smoothly. It was a
very nominal EVA. The suits worked just perfectly, and it was
the kind of EVA we'd like to have all the time. We were trained
for, and we went right on the timeline. The suits worked
perfectly so there were no malfunctions at all. When we
completed that task, we moved back up the sill... and next
slide... came back up. This was me right at the OMS work
station. The picture that Kathy shot while she was out there on

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 8

the side. I got my little needle nose pliers that I helped
her... that got some of the safety wire out of the 0RS...the valve
module itself. When we had completed the ORS task, we moved back
up and Kathy translated along the SIR-B antenna to look for
things that we did our scheduled IFM on the Ku-band
antenna . . .Next .

SULLIVAN We, of course, did a lot of what we call IFM, which

is inflight maintenance, and we have a full locker of tools that
you probably all recognize or just like you'd get out of your
hardware store. Some of them are modified a little bit for use in
zero g. All of them have velcro so you can stick them places and
keep track of them, I think, maybe, we were the first folks to
combine and inside and outside IFM on a flight. And the problem,
as I'm sure you're aware, was that one of the pivots on our Ku-
band, or high frequency antenna, that we use to talk to the
tracking satellite, had evidently failed and, at the time, we
were not sure if it was an electronic or a physical jam type
malfunction. So while we were out EVA, folks on the ground
requested that Dave and I go over to that corner of the
spacecraft and attempt to manually align the antenna such that
its locking pins could be driven home, and we would have a stable
antenna that we then could point very accurately and predictably
at the tracking satellite and that we also would be confident
would stow properly for entry. That antenna is locate J basically
just to the left of the point of view of this picture, and it is
deployed out over the side of the Orbiter when it is in use so it
is critical that we get that swung back inboard in order to close
the payload bay doors successfully for reentry. We had some
superb support from Pinky Nelson and Jerry Ross, other astronaut
core members down here on the ground who simulated a 13 those
actions in the water tank and looked at the real hardware over at
the communications branch and were able to send up to us very
accurate and precise instructions and some very good advice
without how to go about doing that task and where to position
ourselves. It turned out from the position that Pinky
recommended, up along the starboard side rail, there were plenty
good hand holds on the antenna and very good view into its
locking pins and fortunately the dish was perfectly free on the
hinges and very easy to position. Probably the only small hiccup
in that process was on the inboard end of the scheme where Crip
and Sally and Jon were simultaneously supporting Dave and I on
the EVA and making ready to drive these pins home with another
set of cables that we had made up in an inflight maintenance
procedure. And unfortunately there had been a small, but not
minor error, in the procedures that came up to us, and when it
came time to stick the two ends of the cable together to begin
driving the pins home, we had socket to socket on that cable and
that created a fairly intense mad scramble to remake the cable
and get everything ready to go. Dave and I actually were wishing
that they'd manage to slow down and not be so hasty about it
because we were very obviously enjoying ourselves EVA-ing. I
don't think we would have minded a little time on the rail to
take a look at the Earth as it went by, but it all worked out

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 9

well. It didn't appear to us to be a lengthy hang-up getting
that cable remade at all. I'm not sure we appreciate the
activity level inside, but we did notice the windows were sort of
empty when we went by on our way to the antenna. I think people
were otherwise occupied. Following that operation, again, at the
request of Mission Control, I translated out along the edge of
the SIR-B antenna which was folded up and latched at the time to
inspect the various attach points for the two leaves that move on
the structure and primarily to make sure that the inner leaf,
which is the central piece of the sandwich that you see there,
had folded down correctly and was not interfering with the action
of the outer leaf. And it looked to me that that was the case.
A;td the antenna was latching properly, and that was fortunately
for the SIR-B team. Good enough of a blessing to press on and
get them another days data. And we were all very glad that that
was the case. We were pulling for them at that time. And the
next slide... one of the things Dave and I did ensure that we
made a little time to look at the Earth, and I think this was one
of the things we both enjoyed quite a lot about being out EVA-
ing. This slide is, I think, was actually taken on one of our
EVA revs. We certainly came right down over Long Island and Cape
Cod on the first pass, and I remember being very impressed with
the coloring on the ground that you could see from there. And
the other point of interest about this slide is that it
highlights how thrilled we all were to be flying a high latitude
flight. There are areas of interest, home interest to both Marc
and Paul and I, encapsulated in that one side, and ic was really
a pleasure to be flying over recognized high latitude areas
of .. .especially North America but also other parts of the
world.

GARNEAU I have to admit to this, being a Canadian, I spent

every opportunity that I could looking for different views of
Canada. If you look carefully, you can see Nova Scotia up where
the arrow is, and I own a house in Nova Scotia so I was looking
for it everytime we went over. Fortunately the angles were a bit
oblique so I didn't see it, but it was very nice to go over my
own country. Next slide

CRIPPEN This is a picture of Washington, D. C. that we got

on one of our passes when it was very clear there. Looking
straight down on it, you can see Dulles Airport off on the lower
left and Andrews Air force Base to the right. Kind of spanning
the entire city, capital city of the United States. It was very
pleasant to look down and see that. The three in the middle of
this table are all from the Los Angeles area and we had to fight
over who got to talk about this slide. I think we flipped a
three sided coin and I won. That's Los Angeles that's right in
the middle. Unfortunately I was in sort of the same position
that Marc was, we never went directly over the west coast of
California so this was about as close as we got. A nice oblique
shot, and I never did see my parents home. Next slide. We
spotted the nearby airport, though. You know, I'm sure those of
you who have been around the space program very long, hear all

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 10

the crews, every time they come back, say, you know it was
magnificent up there, I wish I could explain it to you or
describe to you how it really looks in space. It's just ab.mt
impossible. Like I have always told people, you've got to
experience it yourself, but we made a feeble attempt here to
bring you back some of the most spectacular shots that we felt
like were of value to you. Theue are the Greek Isles, and I
think, that's one of the most beautiful shots that we took during
the whole flight there. You can see just about all of southern
Greece, the Greek Isles, Athens, there in the top center of the
picture, and the Port of Pireaus of the airport down at Glafada,
and just absolutely spectacular views. And one of the things I
remember, the flight, was a sideways pass that we made over this
very same part of the Earth looking towards the west, and you
could see all the Mediterranean. All of Italy, Spain, France,
Portugal, the Straits of Gibraltar and North Africa, all out of
one panoramic scene out of your window. And it's things like
that that you can't explain to people. It's something you've got
to experience first hand. Next one. This is a shot that we
took of hurricane Josephine which was on our minds. Well, not
so much as it was to most of the people down on Earth and to
Mission Control and around the Kennedy Space Center and the east
coast of the United States. We weren't totally aware at the time
what consideration was being made for hurricane Josephine and its
possible impact of our landing down at the Cape. We were
following it during our daily passes. People were worried that
it might come ashore and maybe delay our landing by one or two
days, which would have been fine with us, I think. But that's a
spectacular view of Josephine off the east coast of America.
Next one.

CRIPPEN Well, as you know, this was my third attempt to get

into Cape Kennedy, and with Josephine out there, I wasn't really
sure it was helping me out. But when it came time for landing
day, this was the kind of scene we had available to us. There's
the VAB, and there's the Shuttle landing facility, and there's
the pad that we launched out of, and it was just about this
clear. Next slide. That is a little bit of... looks like the
fire ball during entry, in fact Dave took this shot. It almost
is the exact duplicate of one that John Fabian took on STS-7 as
far as the colors and so forth that appear in the picture, that's
the way it looks. As I mentioned, it was clear coming into the
SLF. John Young found me some good weather, finally, and we
actually could see the landing facility when we came over
Jacksonville, still doing about mach 4. Next slide. We landed
on runway 33, there. The winds were nice and pretty much down the
runway. The vehicle behaved as it always has for me, superbly.
The touchdown and the rollout were essentially nominal as far as
I was concerned. And I'm looking forward to getting a chance to
do it once more sometime. That concludes the slides. That also
concludes our presentation as far as we are concerned. I will
repeat once more, I though it was a fantastic mission. I believe
we collected a lot of science* And I want to reiterate that
having people onboard the spacecraft as well as the Mission

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 11

Control team and everybody associated with it down here on the
ground, is what made it a success.

PAO

Okay, well any questions now, here in Houston, and we'll take
other centers. John Getter.

GETTER

I'd like to ask Doctor Sullivan to do what all of you said you
really have trouble doing a whole lot, and that is... try to
capture if you could... we know the suits worked, we know that the
cooling cooled, the heating heated, all of that stuff happened,
but what was going on within you. Can you share a little bit of
that. .. that ' s something that we all try to understand. And, I
guess, except for about 40 people, who never quite will.

SULLIVAN

Well, John, I think primarily what was going on in me at the time
was a very keen awareness that Dave and I were previleged to be
an active part of a very important demonstration as far as the
space program's abilities to move into a new era. And that's a
very unique experience that I was very pleased to be a part of.
And what really was primarily on my mind was reviewing what we
needed to do and making sure that I was mentally prepared to do
my bit in supporting him on the ORS and then reconfiguring the
Orbiter to press on with the rest of the mission. It really was,
most of the time, a background consideration that this was
happening in such a unique environment and that the view out of
my visor would not be the view that I'd had in the wet F for all
those months. And the moments that we could pause for a bit and
stand back and allow that view to sink in were moments I'd have
to agree with what Jon says, you'd just have to experience to
understand the three dimensionality of what you are seeing in
front of you can't be conveyed in pictures and the detailed
textures and tones that you can see with the human eye also can't
be picked up on film. So there's just a depth to it that I don't
think you can put in words or on film. But by and large, I was
thinking about and concerned with the things we needed to do and
the hopes that the suits would run as solid as it looked like
they were going to, and just let us go do our job.

GETTER

No major, gee whiz in those periods when you looked up and they
weren't in the window and you were waiting on them to come
back . . .

SULLIVAN

Oh, there were some gee-whizes.
PAO

Okay. Carlos Byars.
BYARS

I have a question here for Commander and then a question for the

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 12

EVA crew. Bob, when you... after you had had touchdown, were
there any... do you know what happened with the brakes or did you
have any braking problems? There was a puff of blackish, black
or brownish looking smoke that came out there and we're wondering
if perhaps the brakes frittered themselves away on you.

CRIPPEN

We did have problems with the brakes again. It was determined by
post flight inspection. The degree of it was probably somewhat
like we've seen on previous flights. I don't have the details of
that right now. With regard to the vehicles performance from a
braking stand point, it braked just like we were suppose to. The
braking profile we use is after we get the nose on the deck, we
normally wait till 120 knots and apply the brakes to achieve
about 8 foot per second squared deceleration. And that's what
we did until about 30 knots and released up. I did feel like I
was getting a little bit of on and off, even with constant brake
application. It not enough to even hardly deflect my needle that
I was observing for the decelleration , but I could feel it. It
was somewhere in feeling to anti-skid. . .coming on and coming off.
However, we really have never had the anti-skid on these brakes
actually work so I don't believe that 's what it was. It may
have been associated with the problems with the brakes. But once
again, we stopped. We had no problems stopping and it stopped in
about the same distance that we've been doing on previous
flights .

BYARS

For the EVA crew. I believe you mentioned that you all had to go
out and take a look at the hinges on SIR-B antenna and these
apparently are rather complicated devices... the hinges and the
locking mechanism itself. Would the two of you comment on the
complexity of that piece of gadgetry and what the prospects are
for coming up with something nice and simple that works.

SULLIVAN

Well the complexity of the device that did us a little bit,
Carlos, was that there are several interlocks or micro switches
on the structure that are meant to indicate when certain pieces
are closed or open that are factored into whether the next
sequence in the operation can be done or not. Ana what prevented
us from latching up the antenna per our normal procedures, was
that the outer leaf had not closed down far enough to trip the
micro switch that indicated that it was closed, and the latches
were prevented from driving by the hardware unless that leaf was
all the way firmly down. I think we only missed that micro
switch by a fraction of the inch, but they are very precise
switch mechanisms that a fraction of an inch is all it takes.
The folks that designed and built the antenna and who are, I
think, even as we speak, considering reflying that antenna or a
derivative of it for subsequent radar missions are taking our
comments into account and looking at their design right now to
assess whether the motor torques are high enough and whether the
micro switches in the functions that they had built them into

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 13

™f H y necessar V- And I know that they will come up with
some good answers and make whatever changes they need to to
support another flight, I'm sure.

BYARS

?hT!;'«^ a ^ r U 90t any su 99 es tions as to how they might revise

outer ?eaf a dirnn? 0t i Stalled b V fraction of an inch or whj the
oucer leat did not close properly.

LEESTMA

Well, we're not sure why it didn't close properly When Kathu
went out there to look at the SIR-B, it lookeTlike sole It tL
insulation may have popped up a little bi? and prevented it f?om
Si°n in ! 311 . the Way down easil y« Th * »otor 8 that drJvftSe lea?

whv I think V H ty hi9 5 t0rqUe m ° t0rs ° r ^ything. And thlt'I
why, I think, when we drove with two motors, we iust aot a. lien*
bit more speed up, and with enough dynamics 'to close down an"d

e m micr ? pitches. They might loosen there tolerances on
the micro switch, you know, and maybe give the crew a few more
options to do rather than if you don't make the micro switch or
micro switch fails, to still enable you to drive the litres.

SULLIVAN

llllTrk 1 ^ i - k thi f factors into Crip's comment about people

^ Their ? arly a PP roa <* to the design was to prevent
people from messing it up, and after they saw how well the
procedures that we had worked out with them actually worked thev
?i?h« th^n iS e S *?J. lef f U t0 ° Ur ^sponsibiluy lo not ton 1? P
recanting Sn ?hat! 9 automatic systems ™* they're P

PAO

Okay, right back here.
O'NEILL

iniftaMon^f Canadian Press. For Marc Garneau, part of the
invitation of the Canadian to fly in space was to make
participation in the Space Station more attractive Now that vou
have spent eight and a half days up there, can you comment ol
what three months or more might be like? comment on

GARNEAU

Well, I'm certainly sold on it. I think that three and j h.if

S^h- iS *5 obabl y a V6ry varia ^e amount of time SoviSusfy
somethings have to be adjusted for that length of time! but I
think, trying to project ahead three and a half monJS period f,
SpL ta c2 ly 3 V6ry variable one and probably is idea? in^Iny wavs
because you can undertake many activitiesthat require a iLgT

PAO

Okay, Paul Recer.

RECER

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 14

Yes, for the space walker group. Since you have now transferred
hydrazine in space, do you think is would be feasible to do it on
Landsat as predicted and have you come up with any recommendation
for any change in the procedure or methods that you used on this
mission?

LEESTMA

I would certainly say it was feasible to do on landsat. Again,
you need a firmly support structure with a foot restraint so that
you can, so the EVA crewman, has his hands free to operate. And
you would also have to have the landsat securely based somewhere,
put into a special support structure or something inside the
payload bay. Landsat, itself, is not designed to be refueled.
It can be using the specific tools that we used, and that's what
we were trying to prove. If we were going to design from the
base up, satellite to be refueled, I would design a better
interface than what we have right now to refuel satellites. A
quick disconnect or something that would make it considerably
easier to make the connection up to flow the hydrazine into the
satellite. And those are being looked at right now by our
projects divisions here at Johnson Space Center.

PAO

Okay, Jim Asker
ASKER

Jim Asker, Houston Post. For Kathy Sullivan, by my account, if
you had stayed out nine minutes longer, you would have had the
longest EVA for any women — Russian or American — I was wondering
was that in your mind at all? Are you disappointed?

SULLIVAN

Most people who know me know that I don't care a whole lot for
record books. I was totally unaware of what the time on
Svetlana's EVA was, and not at all concerned for how my time
was going to match up to that. We, in the initial planning for
this flight, had nestled the EVA very carefully and precisely in
between data passes for the radar and other experimenters and
throughout all of our training, both the IV crew members and Dave
and I outside, we had built a pattern that said get out on time,
do the job and get back in in time to get the experiments ba«- •'<
under way again and not perturb their timeline. And that was
certainly the frame of mind X was in, and I think the same is
true for Dave and every one else. And as far as I know, we were
all sort of surprised to read that in the papers when we got
down, say, oh, five minutes here or there, but our concern was
getting all of the tasks done on time and not producing an
interference between them and that's what we went and did.

ASKER

Also, I'm wondering from perhaps Bob Crippen and Sally Ride, if,
you know, this mission had a number of, I guess, we could call
them minor problems, things that came up that had to be fixed as
you were up there, in your heart of hearts, does this make a

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 15

mission more fun if you have 3ome extra problems you have to
solve up there?

RIDE

I think it depends on when you ask. If you had asked us in the
middle of flight day one, it was not more fun. At the end of
flight day one, it was, I think, there was a definite sense of
satisfaction that you get from being confronted with some
problems and having a variety of different things to try and
having one of them work. And, I know, that we were all proud of
the way that we were able to overcome the problems that we were
faced with during the flight. And that involved, I think,
everyone on the crew, at one time or another, picked up a wrench
inside the Orbiter and took something apart and put something
back together, and maybe spliced some wires or hooked up cables,
and we were very pleased with it.

CRIPPEN

I could just as soon do without all that excitement.
PAO

I'd like to go on and take questions from the other locations
now, and then we'll come back to Houston for a couple of wrap
ups. We'll go now to Ottawa.

MCKENZIE

Hillary McKenzie with the Globe and Mail for Marc Garneau. Marc,
based on the experiments that you did, can a person stay up there
for a year or two without artificial gravity. Can the human body
with stand that?

GARNEAU

Well, I'm afraid that I can't answer that question. The
experiments that I did were involved with looking at the one
aspect of adaptation in space, and to project into what would
happen over the period of an entire year, I think, I'm really not
qualified to do, I'm sorry.

last few days... was wondering if you could tell us a little bit
about your debriefing, and if it assured the success of your
experiments?

GARNEAU

Basically what I've done is to debrief the principle
investigators for the various experiments that I was involved
with. All of whom were down here during the mission and after
the mission. So, it's basically talk to them about the results
that I obtained, and try to answer their questions. Secondly, I
wanted to spend sometime looking at all the photographs that were
taken during the mission with the various different cameras, and
particularly those that were taken of the Earth. And, of course,
I was particularly interested in those of Canada. And there were
also debrief ings at the crew level, and I had the opportunity to
debrief some of the NASA people about my particular experiences.
On a more general level, the training that I had been given in

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 16

*4 n z? th ? past two months ' whether that was adequate or
not. And to give them the necessary feedback that they will need

in if? ^/S 3 "^ thin9S for future P^yload specialists! So, all
in ail, it has been a very busy time. But I think that the
Canadian principle investigators have had, at least, a first
amount of feedback on the results that I obtained while I was up

MONGRETH

Helena Mongreth with CKLY-CKBY News Radio Ottawa. Marc, again
I d like to know, after all the research and preparation you out
into ycur experiments, were any of the experiments or the
comparisons you did with Ken Muny on Earth a surprise to you?

GARNEAU

The experiments pretty well unfolded as we had hoped. There were
somethings that we had to learn up there that you can't really
anticipate before you go up there because of the fact it is a
different environment. Performing some of the experiments in
some cases was a little more difficult than I hadanticipated,

?!!if C ? r i; inl K, al i ° f ^ 6m Were achie ^able and I feel v«y happy
that I was able to achieve those aims of the experiments.

DUFFY

Diane Duffy with CBC Television in Ottawa. I would like to know
when you're coming back here, and what your plans are, either the

yrdolet°back°Lrr 9ement8 t0 talk agout ^ •*P«i!™« oSX
GARNEAU

atll'fl a ? look i n< 5 forward to getting back to Canada. I've been

away for two and a half months now, but it will be another week
llf°J e I ?° T ge ^ ba P k because I'm ^ing on a short holiday with r

L f •? that 1 2 going to be on tne road ^om mid November
to mid April... except for Christmas day. So I know it's qoinq to

to lV\uTVt't n Ll r6ally , U Whe " 1 Sa * I,m looking 9 ?o?wa d
to it, but it's not going to start until about mid November.

Question in French for Marc Garneau

GARNEAU

{Garneau 's answer in French)
INGRIM

(Garble) from the Ottawa Citizen. Can you tell us what your

?J a ? S ar f^ a ! te f yo V have finished the publicity tours, I guess
that would be in mid April, as you said. ' 9^ss t

GARNEAU

i J? St ?°^ e t0 sort of fade back int0 the background of the
National Research Council for awhile and help to support the next
Canadian who will be going up, hopefully in the spring of '86

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 17

MCKENZIE

To Marc, again, and it's Hillary McKenzie. Marc, what was the
hardest thing that you had to adapt to? Was it, as you thought
it might have been, your sickness problem?

GARNEAU

Well, I'm not going to uik about my personal condition at this
conference. However, I was able to achieve all of my objectives,
Hillary, without any significant difficulties. The days were
quite long and there was a lot of objectives to meet, and there
were a few secondary objectives that I was not able to meet, and
it was simply a question of time. But everything was achievable,
and I really don't think in terms of something that was very very
hard to do that I had difficulty getting around to do. Everything
I had trained for during the six or eight monthe prior to the
mission, I trained sufficiently that I knew what I had to do.
Sometimes there was some adjustment to make up there in the
zero... micro gravity environment, but nothing stood out as being
very difficult.

GRANITE Marc Granite with TVOH News. Commander Crippen has
said it was crowded up there. Do you believe that seven people
in space is perhaps too many people for such a space mission and
was it, in fact, uncomfortable?

GARNEAU I wouldn't describe it as uncomfortable. Everybody
was well disciplined and very considerate of each others
feelings. Certainly when seven people are up on the flight deck
and they are all trying to look out of the windows, and perhaps
trying to actually take photographs or point instruments, then
things do get rather cozy. But I was on the mid deck for quite a
bit of the time and had it all to myself on a number of
occasions, and it's nice to have two areas, if you like, where
you can move from one to the other. I wouldn't say it was
uncomfortable, but definitely, for Commander Crippen, who has
been on missions with five and would appreciate the difference
that it makes, I'm sure that it's more comfortable with less
people.

PAO Final question from Ottawa, please.

(Garble). My question is for Mr. Crippen. During the last
mission of Challenger, the crews successfully was able to
transfer fuel from space Shuttle to satellite, is it yet to early
to obtain such methods could be used in case another space
Shuttle was in difficulty in space. What I mean is, are we ready
to two space shuttles participate in the same mission as was the
case for Gemini 6 and 7?

CRIPPEN We're not to that point as yet. It certainly is

feasible with the number of vehicles that we have. However, this
particular experiment was oriented toward the Shuttle working on
another satellite rather than a Shuttle to Shuttle kind of
operation. There is no doubt about it as we move forward and are

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 18

flying more often with multiple launch pads, that something of
that nature would be possible in the future.

PAO Okay, we'll take questions now from NASA Headquarters.

NASA HQ This is NASA headquarters.

MECHAM Mike Mecham vith Gannett News Service. For Commander
Crippen, you said that you would recommend. .. the communication
system isn't very good... you said you would not recommend having,
for instance, eight people aboard a Shuttle unless there was
something like Spacelab aboard. What would you say to the
question of whether it would be better to just operate Shuttles
with, lets says, a crew of six, rather than seven.

CRIPPEN It certainly depends on what the requirements are

for the particular flight. I have come back and, I think, I have
stated that if there is a requirement to have seven people
onboard, which there was on this particular one, you can do it.
I think we ought to crew the Shuttle for the mission requirements
that... for each particular mission. As seven people can operate,
it just had to be a little bit tighter on the restrictions that
you operate under, that's all.

MECHAM This is terrific...

CRIPPEN What's terrific, Mike. Won't talk to you?

MECHAM ...for a " normal" mission, would a smaller crew be
what you would you recommend? Or doesn't matter?

CRIPPEN I guess I'm not sure what a normal mission is. I
don't believe any two of ours have been alike. I have flown with
five people and with seven people. From a stand point of just
operating in the Orbiter, five is much more comfortable than
operating with seven.

COVAULT This is Craig Covault of Aviation Week, with one for
Kathy and then one for Jon and Crip there. Kathy, you talked
about the three dimensionality being such an important aspect of
looking down, why don't you take a minute and speak of the
geology of some of the more interesting things you saw and the
highlights in that regard.

SULLIVAN Well, Craig, I think what impressed me in looking
dcwn at the Earth as a Geologist was that all the photos I had
looked at in my years that I had been here at NASA, and I think I
have gotten through almost as many as Dick Underwood has gotten
through, but I realize that's a dangerous thing to say. The
level of detail that you can see is very impressive. At the same
time, especially when we had lowered our orbit to 120 miles, the
rate at which any given object comes past you, is very high.
And if you have ideas about making specific observations, you
learn in a big hurry that you need to be prepared several

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 19

minutes, at least, ahead of the site. Basically look each rev
ahead of yourself for where you are going to be coming over and
be very well prepared with your questions about that area well in
mind and consider them multiple times as you go across and look
at it at the varying angles that you see going by it. There are
probably a lot of better ways that an observer onboard the
Shuttle could be equipped. If a realtime observer was deemed to
be an important thing to have, and a lot of new and different
ways that an observer aboard the Shuttle could interact with
other instruments. I think one of the most impressive areas of
the world to see as a geologist from space, to me at any rate,
was the Tibetian plateau and the Karacorum ranges of Northern
Pakistan and India. And that is one of the areas that I had
looked at in most detail on the photographs from previous
missions and had looked at some in some detail in stereo at those
photos and still found that none of that really did it justice.
I guess maybe the panorama that your eye encompasses on orbit and
also the subtleties and shadings that you see from orbit just
never make it through to the pictures.

COVAULT Okay, and then for either Jon or Crip there. A

couple quick questions on entry. First, did all your PTI's cycle
okay on your way down and then take a second and describe the
terrain going by as fast as it does when you're down that
relatively low coming across the country as you did.

CRIPPEN Why don't you take that one?

MCBRIDE

Which one do you want me to take.

CRIPPEN
Both of them

MCBRIDE

Okay.. First of all, we did accomplish all of our PTI's. We did
have one PIT that was scheduled right around mock 6.1 which
unfortunately occurred right on a roll reversal so it was delayed
to about 5.2, I think, on a mock, but we did get all the PTI's
in, they were accomplished. Thank you for asking the pilot the
question, Craig. The second part of your question was, I think
the first thing I saw out my window was Minot, South
Dakota. . .North Dakota? .. .Minot Air Force Base. A very clear
picture of Minot. And then we went into some cloud cover where
you couldn't see any ground. Where we were going to pass right
over Chicago and Lake Michigan, I was looking forward to seeing
that, but unfortunately it was under the clouds. We came back
out again somewhere down over Kentucky or Tennessee and we did
see the TVA reservoirs, Kentucky Lake, which is in Tennessee by
the way, and we saw some... I don't know if Crip saw West Virginia
out his left side or not. I was straining very hard to get a
good glimpse of West Virginia but I think I missed it. We did
get some good glimpses of the Macon, Georgia area. Looking out
Crips window, we could see Warner Robins Air Force Base. And

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 20

then we rolled to my side again as we crossed back over the ocean
north of Jacksonville, and I had a spectacular view of the James
River, all of the naval complexes there in the Jacksonville area,
and I could see the VAB and the landing strip down at the Cape,
and I could see Orlando. And approaching the Cape as we started
our turn on the final, we could see Patrick Air Force Base right
straight ahead, which I mentioned to Crip as we turned around the
hock, it looked like a perfect energy set up to go in and land on
runway 20 down at Patrick, if we ever had to do something like
that. It was very exciting for me.., the entry process. It was
very much like we had practiced over and over again in the
simulators, and I noticed really nothing extra ordinary other
than the g build up when you get to 1 g or 1 1/2 g, it feels like
3 or 4 g's. It's hard to lift your arms up, and it's hard to
keep your chin off your chest, and its just like adapting going
from 1 g to 0 g, its coming back down from 0 g to 1 g is just the
inverse of that.

FOLEY

Teresa Foley from Space Commerce Bulletin. For Sally Ride or
Kathy Sullivan. Last week at the IAF Congress in Lazon, while
you were in orbit, Svetlana (garble) was attending at the meeting
and at a press conference she held she commented that she would
be meeting with the U. S. female astronauts sometime next year.
I was wondering if you were aware of the meeting and if you can
tell us where and when it will be and what you will discuss.

RIDE

I was hoping you could tell me when the meeting was to take
place. I have not heard about that meeting. I would look
forward to the opportunity to talk to Svetlana again. I had that
opportunity about a year ago in Budapest at the IAF meeting one
year ago, Rick Hauck and I were both over there. And she's a
very

confident person, and I have a lot of respect for her and I'd
like to get a chance to talk to her again. I'm not aware of the
meeting that you are talking about though.

SULLIVAN

And I'd like to echo Sally's words. I had chatted with Sally
about Svetlana during our course of our training knowing she had
had a chance to meet her, and have from the media, generally the
same impression, and I very much look forward to meeting her and
comparing notes on EVA systems in the two programs.

FOLEY

And a question for Bob Crippen. You sounded a bit surprised at
the fact that you actually ended up at KSC at the end of the
mission. Given your experiences having flown the Shuttle more
than any other pilot in the NASA astronaut corps, when you get
the flight rate up to 12 per year next year and 24 per year
within the next 3 years, what realistically do you think, how
many times realistically do you think you can land at the Cape,
50 percent of the time or 10 percent of the time?

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 21

CRIPPEN

I'm afraid I wouldn't speculate. It all depends on the weather.
If they have weather like we had, we could get every one of them
in there.

PAO

Okay, we'd like to go ahead and move on now to KSC for
questions .

KSC

Okay, Jay Barbree, NBC.
BADAREE

Captain Crippen, this is Jay Barbree from NBC. I don't know if
you recall our converaation out at New Orleans out at the Worlds
Fair about this landing that you were just asked about, but
that's the question I would like to explore in little detail with
you today. This was the fourth flight for you... fourth attempt
to land here... now we have two of them. And during our NASA
survey before the Shuttle program got under, the KSC landing area
was rated in the top two to three percent of the best weather for
landing Shuttle, this is what I'm told by NASA. Do you have
any... did you have any problems coming in with your landing, with
the head winds, here on this landing at all?

CRIPPEN

The weather couldn't have been any better this time. It was
totally the opposite of what I'd seen or attempted in both
flights for STS-7 and 41-C. There was no problems whatsoever.
Everything was perfect. They had been projecting a little cross
wind; that never materialized. The winds were essentially on the
nose and very light, really. There was no turbulence, the
visibility, as we indicated earlier, was superb, but it varies
down at the Cape, as you are well aware of, and it just depends
on the time and the occasion. So it's very difficult to
speculate about weather, the weathermen have a hard time and I'm
certainly not going to try it.

BARBREE Well, the weatherman you're telling me that the
realtime is the summer months and the afternoon thunder bumpers;
otherwise, we have great weather about every day, and I think,
what I'm getting at here is is we're beginning to get a hard
knock on this thing.

CRIPPEN I'm certainly not knocking the weather in Florida.

BARBREE I'm just wondering has NASA's opinion changed? Are
we still in the top 2 or 3 percent? Is that a correct forecast
or is it something that you are just going to have to wait and
see on every flight on.

CRIPPEN Yeah. I'm not familiar with the report that you are
talking about... 2 or 3 percent. We have done a great deal of

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 22

looking at the percentage of opportunities for meeting the
various criteria we have with regard to cloud cover, winds, etc.,
and I don't believe they were quite that high of percents that I
looked at them the other day. But, because we are constrained by
the orbits we are flying as to when we can land and,
certainly, if you could come down anytime, there was some
beautiful times the day and the night at the Kennedy Space
Center, but the orbital trajectories prevent you from doing that
quite often and you have to take what's available. And there are
things like morning fog that you have to contend with. There are
things like cross winds that you have to contend with. And
there are things like you thought of with the afternoon
thunderstorms, and as evidence with STS-8, they have
thunderstorms in the middle of the night, too. So, it all
depends. I would also say that you have some superb weather in
Florida and I enjoy it everytime I get a chance to go down
there.

KSC Frank Yosenda, Today.

YOSENDA First question is for Crip. On this flight, you had
no chase planes with you coming in. How did you feel about that
as a pilot in terms of your approach to the runway. And second
of all, do you see, a kind of a follow up on Jay's question, do
you see any bending of some of the rules now that you are getting
more familiar with landing.

CRIPPEN Well, I haven't had a chase plane on any of the
landings that I have been with the exception of the one I rode in
on with John. So, I, mainly because I was never where they
anticipated that I was going to be, I guess. But I, we decided
quite sometime ago that it wasn ' t ., .after the OFT f lights. .. that
it wasn't necessary to have chase planes. We've put out in some
cases TV for public affairs purposes, but that really wasn't
necessary in... it didn't make any difference from the stand point
of us proving the

Orbiter. And with regard to bending of rules, I don't think we
are bending any rules. We establish some criteria, or mission
rules, that we do modify as we become smarter about the Orbiter
and operating it. But those are not what I would refer to as
bending .

YOSENDA Okay, thank you. The second question is kind of a

jump shot for whoever wants it. A lot of the Earth. . .excuse me,
a lot of the headaches you had up there during the flight, came
from human errors that were made on the ground. What kinds of
things do you suggest to aleviate that in the future? One
possibility to consider, would it be possible to carry a check
list with some of the key things up there so you can double guess
what's going on the ground if there's an error made.

I don't want that one.

CRIPPEN

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 23

Why don't I try that. I guess when you operate any system that's
complex as the Space Transportation System, it's just going to be
room for errors. We've made errors on board as well as having
errors made on the ground, and we all use check list and
procedures to operate under. There's no way to 100 percent to
get away from that. I think the bottom line, though, that none
of them were that serious. They recovered from all of them in a
matter that made us accomplish all of our objectives. So, I
personally would not go back and chastise anybody for those, but
invariably when we do make errors, the system here at NASA does
have us go back and review why we made the errors and we attempt
to prevent those from happening in the future,

KSC

We've no further questions from Kennedy.
PAO

Okay, we'll take questions now from Marshall.
PAO

Do we have any questions from Marshall?
PAO

Okay, we'll bring it back to Houston now. Apparently can't do
it... just a couple of final questions if we could, Doctor Page.

PAGE

I have two questions. First for Marc Garneau. Astronomers are
very interested in your OGLOW data. Did you get photos through
your six filters and two fabrey perot ettilones at both high and
low altitudes. Could you estimate visually the difference in the
intensity of the glow at the two altitudes.

GARNEAU

We are talking about the Orbiter glow here, sir?

PAGE
Yes.

GARNEAU

Ah, yes, there were two opportunities to take pictures. Both at
the 190 nautical mile altitude and the 120. I'll be going over
to look at those photographs as soon as I'm free from the press
conference, in fact. They've only finished developing them
today. I'm looking forward to, hopefully, finding some good
things. I was definitely able to see the glow through an
intensifier. I was disappointed that I couldn't really see the
glow with the naked eye. I'm talking about the glow here
(garble) interaction with the gases up there as opposed to the
glow that occurs when a thruster firing takes place. But I won't
really have the answer until I look at these photographs in about
an hours time.

PAGE

< STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 24

I've heard of Dave Kendall and I presummed that you will be able
to tell me a little more about it after the....

GARNEAU
Ves, sir.

PAGE

My second question is more controversial for Commander Crippen,
I know that it's NASA's policy not to reveal which crew members
suffered from space sickness, but can you give us some simple
statistics. Did more or less than the expected 40 percent of
your seven man crew, which would be three, suffer.

CRIPPEN

Doctor Page, our answers to that is still the same. We don't
want... do not discuss who felt bad, who didn't feel bad. I will
say that everybody on the crew certainly performed all the tasks
that they had without any problems doing.

PAO

Okay, John Getter.
GETTER

A question for Commander Crippen. Now that you are getting a
second office, I'd like to ask you a question from both
perspectives. One of these days, somebody is going to have to
deal with the "what if" that people don'e like to talk about... a
return to launch site abort, transatlantic abort, something of
that sort. And from the studies, from what I understand of the
studies that have been done, that's going to require some pretty
heavy dependence on the brakes. So far, every time the brakes
have been used, they have essentially self destructed. How do
you look at that in perspective. How serious of a problem is the
brake problem. They've stopped you every time, but they haven't
stopped you in a short of distance that you might have to stop
some day.

CRIPPEN

You are absolutely correct, John. The brakes are a concern to
us. We do have extensive engineering effort trying to understand
that. In fact, we had some special instrumentation on our brakes
this time to help us better understand what the problem is.
We've made some modifications to them. However, the
modifications we've made to date, we have not really noticed a
significant improvement. However, in every case, the brakes have
stopped us. There's been no case where the stopping distance was
affected by the failure in the brakes to the best of my
knowledge. We have never attempted to really do what I'd refer
to as a max braking DTO where we were really just locked them up
because of the anti skid that's available to you. Everything
that I have seen, has said, that if the brakes function as they
function in the past, they will stop even a heavy weight vehicle
in the amount of runway that we're talking about. What we are
concerned about, I believe, is that since the failures modes are

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 25

not always predictable, that we could have one fail in the manner
that locked a brake up, locked a tire up, and that would not be a
good thing. Consequently, we are worried about. We are working
and we're going to try to improve the situation.

PAO

Okay, final question from Paul Recer and then we'll try and take
a couple from Marshall and close.

RECER

Yeah, for Scully-Powers. The... you were up there to make
observations, did you detect any previously unsuspecting
phenonoma that will, in fact, be followed up with sea level
examination, and does your experience indicate to you that
placing an observer onboard, such as yourself, is in fact, worth
the weight, shall we say.

SCULLY-POWER

I think as I've already mentioned, the perhaps the less
significant observation I made, a lot of the dynamics in the
ocean which we had previously thought to be isolated events, are
in fact interconnected for thousands of miles, and both through
the tearititions and the (garble) ocenographers , I think that's a
big event. The only reason that you can make that observation is
to have someone up there to make it. And if you use your mite
sensing satellites, first of all they look straight down, and we
were looking out at an angle. So we got the panoramaric and
could see the dynamics interacting with each other. And I think
why we were able to make these new discoveries is the fact that
you have got a person up there who can sort of search out a very
wide field of view, and then narrow it down into specific events
coming home with you in the field. You just can't do that with
remote sensing satellites.

PAO

Okay, we'll take a couple of questions from Marshall; then we'll
close.

DAVE DOOLING (Huntsville Times) For Dr. Scully- Power, with
all... for more than two decades of manned space flights, why is it
that it wasn't until STS- 1, that these ocean eddies were first
spotted. Is it that subtle of an effect. Do you have to have
highly specialized lighting conditions to see it?

SCULLY_POWER

I think, we get (garble) each flight we make. And, I think, it's
only been recently that we 're... last few years... that we've
really come to consider the fact that the way you look at the
dynamics in the ocean, is to look at it in terms of the sun glit
patterns becasue if you look normally, unless it's a very strong
color change, you won't see it. But what happens with the ocean
dynamics is that it picks the surface texture of the ocean. And
when you look into those suns specular pointed, as what I like to
refer to as a natural enhancement of that, yeah, you may have

STS-41G CREW POST FLIGHT PRESS CONFERENCE 10/18/84 PAGE 26

seen that if you have ever gone in high flying aircraft. You can
see (garble) things in the ocean that are not normally seen.
And, I think, we are getting smarter in how to interpret those
images.

DOOLING

Okay. And iinal question. In terms of, again, the issue of how
crowded the flight deck was. Might it have helped your work, had
a separate observation window had been available, never mind
whether it's feasible at this point to build one, but would it be
helpful at eye ball work such as you were doing and Kathy may
have done geologically to have just a separate dedicated
observation window?

SCULLY-POWER

I don't think so. For a number reasons. I think, post
flight... pre flight, if you had asked that questions, I would
have picked the wrong window. We found when we got up there,
what the right windows are to look at the ocean. And then it
depends what you want to do and depends where the sun is, and
depending on the attitude of the Orbiter, depends on which window
is the correct one to balance all those affects. So, I in fact
used every widow in the Orbiter.

RIDE

I'd add to that comment that there was at least one respect in
which some number of folks on the crew, five or seven, whatever
it may be, is a benefit to people who are trying to do
observations out the window, and that is as I mentioned before,
the ground or the ocean, whatever you are looking at, goes by you
very rapidly. And we very commonly worked in a mode where the
folks primarily wanted to just look or didn't happen to have
their hands on a camera at the moment, took windows that were
sort of leading and giving the view ahead and could be sort of a
lead in controller for the people who did have the cameras and
advise them from the point of view of getting a photographic
image of a phenomenon that had just been seen, which side was
going to be best or which lens was needed where I think, that
enhanced probably the data return of the crew as a whole, that we
did coordinate and work in that fashion. And as Paul said, a
number of windows with various geometries in, a number of people
available to help each other out certainly supported that
effort .

MARSHALL

Thank you, no more from Marshall.
PAO

Okay, we'll call this one over. Thank you very much for coming
out .

STS 41-G PREFLIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 1

PA0 Good afternoon, ladies and gentlemen. One

observation, with 7 members this orew, the crew of 41-G is, is
equal in size to the entire astronaut corps back in the Mereury
space program. It's our pleasure this afternoon to introduce the
largest space crew in the history of mankind, 5 men, 2 women and
without further ado, I'll turn It over to Commander Crippen.

CRIPPBN Thank you very much, John. I was telling John, I

think maybe we've found the limiting factor on how many people we
oan fly in the space shuttle in the tables, it won't handle any
more than that. Thank you very much for joining us this
afternoon. We think mission 41-G is going to be a very exciting
flight. Not only are we going up to 57 degrees, (garble) haven't
had the opportunity to be at that latitude myself before, but
we ve got an intensive science program, as well as a apparatus
that will extend what we did on my last flight, 41-C, looking at
satellite servicing with a fluid transfer. We've gone
international, by flying a Canadian on the flight, so we've
really expanded the capabilities of the space shuttle. What I'd
like to do today is to introduce my crew and then each of them
will individually cover some aspect of the flight to make you a
little bit more familiar with it. My pilot is Commander Jon
McBride and he will keep me out of trouble at the, up at the
controls. To his right, Mission Specialist, Dr. Kathy Sullivan
and she is my Earth observer, being very, having extensive
knowledge about that. To her right, Dr. Sally Ride, who flew
with me on STS-7 and knows how to keep me on the right line as
far as all the procedures are concerned, is also our prime
mechanical arm operator. To her right, Lt . Commander Dave
Leestma who is one of the smartest young navy men I've ever, ever
worked with and he is going to be the man in charge of our
hydrazine transfer operations and will tell you a little bit
about that. Dr. Marc Garneau, who is a Commander in the Naval
forces of Canada will be flying with us and he's performing
extensive amount of experiments onboard that he'll relay to you
and to his right, Mr. Paul Scully-Power who is flying,
representing the United States Navy, who is a civilian
oceanographer . And they'll will give you a little run down on
what their particular aspects of the flight are. So without any
further ado, I'll turn it over to Jon and let him tell you a
little bit about how we get up and down.

MCBRIDE As Crip alluded earlier, I'm primarily onboard to

assist him In the ascent and entry procedures and the flying of
Challenger on the way up and on the way down. Some secondary
Jobs that I'll be responsible for include suiting up Kathy and
Dave, making sure their pressure suits are functioning properly,
prior to their spacewalk. And we're looking forward with great
anticipation to that day. Some other things that I'll be
responsible for, helping out with primarily Include the photo and
the TV recordings that we'll be taking during the flight. We're,
as Crip mentioned very excited about our ascent, it is going to

wmmmmmm

STS 41-G PREFLIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 2

go to 57 degrees inclination which means we get to fly up the
Eastern Coast of the United States and if it's a nice clear day.
we'll get to see some beautiful scenery I'm sure, flying up to
191 nautical miles on the first day also which is going to give
us a good clear view of most of the inhabited portions of the
Earth during our first day in flight. Kathy.

SULLIVAN Thanks Jon. In addition to letting Jon suit me up

for our EVA on day 5, there are few other things we're going to
do. Crip has asked me to take primary responsibility for keeping
Ubs on most of the Earth observing payloads on the flight. We
h&ve three that are grouped together on a pallet that's called
the OSTA-3 pallet. They include a side-looking radar that should
provide a lot of very exciting data to an international group of
nvestigators that will look into how useful this kind of an
instrument could be for monitoring and finding Earth resources
world-wide, an air pollution measurement device and a seeing
classification device. A fourth element of the Earth observing
part of the mission is a large format camera which is basically
an oversized airborne-type mapping camera that will also get very
high resolution photographic images, on about a 9 x 18 inch film
of a large section of the Earth areas between 57 degrees north
and south again for a very diverse and widely scattered
international team of investigators. Those guys, all those
experiments operate almost continuously during the course of the
mission with a very precise set of on and off times to cover the
precise pieces of ground that they are interested in so we'll
have a pretty 'ntricate sets of orbiter attitude maneuvers and
computer mod .. to take care of them over the course of eieht
days. Go fo. it.

K IDE °n flight day 1, we start off, right after we get

into orbit to power up and start the checkout of the ERBS
satellite, Earth radiation budget satellite. We're using the
mechanical arm to lift that satellite out of the payload bay and
Dave and I'll both be working on the arm checkout, grappling the
satellite. I'll be unberthing it, putting it up into a release
attitude. The people at Goddard who are in charge of the
satellite will be sending commands and checking it out through
most of flight day 1 and about 8 and a half hours into the
flight, we'll be releasing it from the arm, leaving it in orbit
and Big Jon's going to perform a one-foot per second separation
maneuver with the orbiter to back the orbiter away from it.
We're going to leave that satellite in orbit to conduct its
experiments looking at the radiation budget of the Earth, things
like the greenhouse effect, for hopefully several years in
conjunction with a couple of other satellites that are going to
be launched by NOAA later on this year.

LEESTMA I'll be primarily responsible for the Orbital

refueling system which is our system that we're going to use to
test out how we would transfer hydrazine If we, in the event that
we do that to other satellites on orbit. On day 2 we will do our
first transfer and we will transfer 90 pounds of hydrazine from

STS 41-G PREFLIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 3

tank 1 to tank 2 and on day 3, we will transfer back all 190
pounds of hydrazine that we are oarrying onboard back from tank 2
to tank 1. And this will be done in two stages, because of the
way that the (garble) recompression works that we don't want to
get the temperatures up too high, because as most of you know,
hydrazine is a pretty volatile fluid and we don't want to get it
to the point where it would do something other than just flow
like water. Then on day 4, Kathy and I will be checking out our
suits, doing all our EVA preparations, making sure everything is
working. On day 5, Kathy and I will go out to do the hydrazine
demonstration of the reservicing tool, how we would actually
connect up to a fill and drain valve of a satellite of the
variety of valve that is used on satellites, most of the
satellites launched to date. With that completed on day 6, we
will do another hydrazine transfer from tank 1 to tank 2, all 190
pounds again and we'll do that through the EVA coupling that we
made the day before. So we will have flowed it all through a
different flow path then and then on day 7, we will redo the same
transfer we did on day 3 back from tank 2, back into tank 1, Just
for repeat ibi 1 i ty of the engineering data.

GARNEAU I'li! be carrying out a series of five Canadian

experiments during the course of the eight days. One of the
experiments consists in recording some video that we hope to use
later and to play back through the space vision system which is a
photogrammet ry base system developed in Canada to try to analyze
how well that system will work. It's a system that we'll fly
later on in the space shuttle flight in 1986. I'll also be doing
some life science work, a package of five small experiments I'll
be carrying out in the middeck, myself and with Paul Sculley-
Power. I'll also be looking at the spectral content of the
Orbiter glow using some very narrow band filters, a group of 12
filters to look at the discrete spectral content of the orbiter
glow at various different times. As well as that I'll be
pointing a Sun photometer at the Sun, directly at the Sun to
measure the amount of energy at various different wavelengths,
I'll also be pointing the same instrument at the Sun, during
sunset and sunrise to see how much of the Sun's energy is
absorbed or scattered in the Earth's atmosphere and doesn't reach
the photometer. Finally, I also have to take some pictures of
some samples that will be taped on to the remote manipulator
Canadarm. I will be taking pictures of these, of these materials
at various different times during the flight to see how they
deteriorate from being exposed to the velocity vector of the
Orbiter.

SCULLY- POWER Well, being the most recent addition to this
program, I guess I'm the one that least is known about.
Basicallly, I've been a physical oceanographer all my working
life. And I've specialized in particular on the understanding
and the measurement and the dynamics of ocean eddies. Those who
are not familiar with ocean eddies, they are large circular
currents in the ocean about a hundred miles across. And it's
reoently been discovered that the (garble) understanding the

STS 41 -G PREFLIGHT CREW PRESO CONFERENCE 9/3/84 PAGE 4

total ocean dynamics is tied up with understanding the ocean
eddies. The other thin? that a lot of people are not aware of is
that just as the weather has patterns in it, the highs and lows
and fronts, so the ocean has similar patterns in it, in fact
highs and lows which are different types of eddies and also
fronts. And it's my job, therefore, simply put, is to look out
the window and to try and interpret those patterns of ocean
dynamics that I see below me. And to photograph them with the
onboard cameras that are carried as part of the regular
compartment of cameras aboard the Space Shuttle. Apart from that
is various research ooeanographer s , who will be out in the course
of their normal research taking measurements in various parts of
the ocean from research ships and I'll be, I have already
interacted with them and will be postfiight with the point of
view of comparing what I see and what I interpret and I
photograph from space with those measurements they're taking in
real time, in that particular area of the ocean. And I think,
and this is sort of an exploratory flight for me and for
oceanographers in general to see just how well, what you can see
from space correlates with what's really going on in the ocean.

CRIPPEN Thank you Paul.

PAO Okay, we're ready now to take questions from

Houston. Please wait for the mike, give your name and
affiliation, since there is a large number of people here today
that I don't recognize, however there's one I do. Jules Bergman,
ABC.

BERGMAN This is for Commander Crippen, anyone else who

cares to corrment. What would you think Crip, would be the single
major thing, if there is a single major thing that would come out
of 41-Golf, and the others chime in, too.

CRIPPEN Sure. I guess as I indicated earlier I think we're

a mix bag, that we are doing a number of things. Certainly, the
Earth-oriented experiments have to be significant. I think all
that is going to work well, the radar antenna we flew on STS-2,
we've taken that and advanced on it, I believe that we've got
some significant contributions to come out of that. I also think
the capability to do satellite servicing by refueling satellites
whose lifetime today is limited by the amount of propellant they
have and that information is also directly applicable to our
spaoestation since we have to know how to be able to transfer
fluids once we put up a station. The Earth radiation budget
satellite is going to help people understand the Earth's weather
a lot more, that's got to be significant as well. And the fact
that we have now gone international, which we will be flying a
number of payload specialists from various countries in the
future and we plan on the space station being an international
venture. All of those I believe are significant and I would not
pick one as being the thing myself. Anybody else care to add to
that?

STS 41-G PREF LIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 5

PAO Frank Seltzer, CNN network.

SELTZER Crip, I guess for you, or would Dr. Ride since both

of you have flown before. What's it like in simulation so far,
having seven people in the size of that orbiter, in a very
limited space?

CRIPPEN Crowded.

RIDE I'll second that.

CRIPPEN Sally, would you care to...

RIDE I think he said it very well.

CRIPPEN No, actually, seven people in the volume that we

have on the shuttle is going to be crowded and that's one of the
things that we've talked about extensively among ourselves, we're
going to have to be very conscious of not getting in one
another's way. It's knowing when critical activities are going
on in a particular area, not to interfere with one another, we're
going to have to be concerned about things like managing trash,
stowing it In the limited volume that we have. All of those
things are things that we're looking at, I'm not sure exactly
what is the max number of people you can carry onboard but we're
pushing it with seven people.

PAO Any other questions?

ASKER Jim Asker with the Houston Post. I'd like to ask

Sally, first of all does the ERBS satellite get left out there,
Is it going to be deployed or do you'll retrieve it and bring it
back with you?

RIDE ERBS satellite is going to be left, left out

there. In fact we deploy it in a 190 nautical mile orbit and
it's got it own very small thrusters that take it up to a
slightly higher orbit, about, about 2 and a half times that high
and it stays there hopefully, operating perfectly for three or
four years and there are no plans to retrieve It.

ASKER And then a question for Sally and Kathy. Do you

anticipate any sort of adverse reaction to the fact that the
first woman spacewalk will be essentially an observer role, where
she'll be observing a man rather than participating direotly?

RIDE I got It.

SULLIVAN All yours.

RIDE First of ail, I don't think that's, that's really

an appropriate way to put it. I mean, Kathy, all of our
spaoewalks involve two people and its Important that they involve
two people. They're both out there assisting each other and

i3TS 41-G PREFLIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 6

helping each other. Dave is going to be the one that makes the
hydrazine fitting, but Kathy is out there helping him,
documenting what he's doing and she's also got some things that
she's been training primarily for. That contingency operations
that if we have to go EVA for example, to remove the grapple
fixture from the RMS, if the end effector fails, Kathy is
primarily responsible for that, so I think that's a very bad way
to put that question.

CRIPPEN Yes, Jim, I guess I would also like to comment that

sinoe it's the commander that makes the assignments, as far as
I'm concerned it's a two person task. In this case, yes, we have
Dave doing the primary actual connections, but it is still two
people working together to make it happen. And that nobody
should look at it in the way as a one person task. It is also,
we have in our plans, contingency operations in case we run into
a suit problem that would allow somebody to stay on a umbilical
but not go out and do functions in the bay. Either Kathy or Dave
could go out and do the task but doing it one person would be a
much harder thing and I hopefully, hope we're going to avoid
that, but either of them are quite capable of doing the task.

PAO Mike Mecham, Gannett News Service,

MECHAM For Sally. Is there any particular part of

releasing the ERBS that is any different that what you did with
the SPAS?

RIDE No, no this is what we hope will become a very

standard operation with the arm, all we do is maneuver it up to a
point above the orbiter where we can see it, and squeeze the
trigger and pull the arm back and do the separation burn. It
ought to be a very straight forward RMS operation.

MECHAM There won't be any orbital maneuvers except to

separate? You did a lot of playing around with the SPAS before,
this t ime you . . .

RIDE No, Jon is, Jon is going to get us away quickly.

PAO Malcolm McConnel 1 , Reader's Digest.

MCCONNELL This is for Paul Sou 1 ly-Power . I believe looking
at the orbit map, that you'll be probably going in a daylight
pass from the 57 south, 57 north southern ocean spring to
northern ocean autumn. Are you specifically going to be looking
for the interplay between northern and southern hemisphere,
climatic zones and/or these eddies and fronts, ocean fronts you
talked about?

SCULLY-POWER In general, Malcolm, the answer to that is yes.
Some of my collegues are very interested In the dynamics around
the equator. Equator has got some interesting dynamics because
in a sense the Barth does not, doesn't have a rotation votor,

STS 41 -G PREFLIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 7

relative to the Equator. So the dynamics tends to be much larger
than what you normally find, The space in between significant
events seem to be larger and there is very little known about
that although the current theory is that there is a big
Importance between equitorial dynamics and mid ooean dynamics.
And so it's really a (garble) thing to see if I can see any
significant dynamics around the equator.

PA ° Jerry Hannifan, Time Magazine.

HANNIPAN Again for Dr. Scully-Power. Sir, you'll be making

visual and I'm sure camera observations of the ocean surface.
Will you be correlating the data that you see in the pictures and
what you eyeball with the side data?

SCULLY -POWER I don't know of any side data that's been taking
(garble) refering to the synthetic aperture radar. Is that the
quest Ion?

HANNIFAN Synthetic aperture radar or the side look.

SCULLY-POWER Okay, I have no control over the synthetic aperture
radar and in fact coming late into the program I really had no
opportunity to interact with those people directly. Most of that
synthetic aperture radar data as I understand it will be taken
over the solid Earth, with a little bit taken over the oceans.
My job is to look and see where there is some significant ocean
dynamics and to take some photographs of that. If it then turns
out that the radar which is preprogrammed does capture the same
scenes, then I will do some comparisons.

p AO This women here on the front row.

PRESS I'm with Canadian Press. I have two questions for

any and all members of the crew. One Is about the training
period, I believe Marc Garneau is going up with the shortest
training period ever, something like 7 months. And I wonder
whether you'd consider that pretty tight and whether there should
be a minimum say of a year or two? And also have any of you ever
been up and not had motion sickness?

CRIPPEN Okay, if I could take that. I'm not really sure

exactly how long Marc has been training as a Canadian
astronaut. Marc, Is that on the order of 7 months now?

GARNEAU Yes .

CRIPPEN Yes, but his association with the program here has

been on the order of about, oh, somewhere in the order of just
less than four months when we first homed in on the fact that
he's going to fly with us. And the extensive training pr Mod
we've picked out was the last two months prior to flight It
turns out that Mr. Scully-Power is, was even shorter, as far as
being selected to go fly with us. It depends on what the person

STS 41-G PREFLIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 8

has to do, there's a extensive period of course in learning
you're particular task. As far as flying onboard the shuttle, I
feel very comfortable with two months, not so much as extensive
training but mainly as a matter to integrate yourself as a member
of the team. I think that we have to function as a team on orbit
and we need a period of time here to work together. I feel very
comfortable with it, I hope that Marc and Paul do as well, tho
thing is that everybody needs to feel good when we take off as
knowing their Job and I believe with one month left, that we will
all feel that. With respect to your question regarding motion
sickness, we don't discuss whether somebody has motion sickness
on orbit or not.

PRESS ...do you still get motion sickness.

CRIPPEN We don't discuss it.

PRESS
PAO

You don't discuss it.

Lou Alexander. Free lance.

ALEXANDER Question for Marc Garneau. Would you disouss the
connection between your experiments and the studies of acid rain?

GARNEAU There's no direct connection between any of the

experiments that I'll be doing. Where acid rain was brought in I
think was in a desciption of one experiment that I'm doing using
the Sun photometer. Sun photometer as I mentioned would be used
to measure the amount of light coming from the Sun through the
Earth's atmosphere, obviously other (garble) hazes in the Earth's
atmosphere as one of the pollutants but we're not looking at
specific case, specifically we're looking at all pollutants
including things like volcano dust and normal aerosols that would
be in the atmosphere and that would block out or scatter light in
general .

PAO

Jules Bergman, ABC.

BERGMAN This is for Crip and Jon McBride as the two pilots

onboard and doesn't directly relate to 41-golf, but the other
week in Washington, the President said, "A science teacher would
be the first civilian observer to fly in space". Well, since I'm
one of the many people who hope to do that and I meet pilot
standards, the physical standards decreed by NASA were rather
amazing I thought. I'd like to know whether you're aware of them
and whether either of you would object to having a person using a
hearing aid whose blood pressure was 160 over 100 in your orew?

CRIPPEN

(garble) I think you're talking about me now.
Got something In your ear, Crip?

CRIPPEN I have not looked specifically at the standards

that NASA has specified. I'm sure that we have had a lot of

STS 41-G PREP LIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 9

medics that did examine them closely. Sorry to burst your
balloon, Jules, but obviously from my experience in the shuttle,
you don't have to be a man of steel to go fly. It's a very nice
benign environment. It does shake you around a little bit on
launch, but not all that much and as long as our doctors here
would give somebody a olearance as far as them being healthy
enough to go fly, I would feel very comfortable with it. I don't
know how we went about saying that an educator would be the first
to fly, but I think that's a good selection myself.

BERGMAN I'm not questioning that Crip.

CRIPPEN Yes.

BERGMAN But I do question the picking of the 180 over 100

as blood pressure figures. Those are figures with which most
doctors would require anti-high blood pressure medication.

CRIPPEN Well I'm not sure whether they couldn't be under

the medication.

PAO We're going to take one more question from Houston,

and then go to Marshall Space Flight Center for questions. Any
questions here? Lady on the front row. Can you hold for a
moment ?

PRESS Can you talk about the, more about the hydrazine

fuel, is it dangerous to move around? Is it something that could
cause a big problem?

CRIPPEN Hydrazine fuel, it's a toxic rocket fuel and if

it's heated up or gets too high a pressure or impurities or
sudden pressure spikes or something, it could decompose. In fact
that's what the fuel Is used in the APU's and that's how the
APU's is run.

PRESS What would happen if It decomposed while you were

moving it?

CRIPPEN It would cause probably the tanks to rupture or it

could cause an explosion, if it did do that but we have taken
enormous safeguard for this and ar- very conservation in our
approach in how we do this, to makv sure that that does not
happen.

PAO Okay, we'll go to Marshall Space Flight Center now

for questions and following Marshall, we go to the Kennedy Space
Center. Take it away Marshal 1 .

Dave Doollng with the Huntsville Times, thank you
John. For Scully-Power, I want to know how you're presence on
the shuttle envolved. I understand that you've been giving
oceanography briefings and debriefings with the shuttle crews for
some time. Did your seat on this mission envolve out of that

STS 41-G PREF LIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 10

work?

SCULLY- POWER The quick answer to that is rather suddenly. The
Navy and NASA have been talking about the possibility of flying
an ooeanographer for over a year now and at first glance, this
particular mission would look to be the ideal mission because it
has a high inclination orbit and it is a Earth science's
mission. But until recently, this mission was due to be flown
aboard the Columbia and there wasn't enough seats, it was only in
early June of this year that this particular mission, 41-golf,
was changed from Columbia to Challenger, because Challenger is
slightly differently configured internally. There is room for
another seat and it was In that point in time that the Navy and
NASA got together and said, well why not we explore the
possibility of flying the ooeanographer on that flight.

DOOLING Is the Navy reimbursing NASA for your training as a

payioad specialist or Is NASA bearing that cost?

SCULLY- POWER I don't know the answer to that question, because I
don't get involve with money.

DOOLING Okay, what in your briefing with the astronauts,

what have you learned from then, what have you seen in the
photos, and what do you expect to get on this flight that you
haven't obtained in the past?

SCULLY-PCWER I think the intriguing thing is that every shuttle
flight today has shown something new in the world of ocean
dynamics. I think that's to answer your first question. To
answer your second question, I think the most significant new
discovery we have made of late is the existence of what is known
as spiral eddies in the ocean. Up to very recently and I mean
about a year to 18 months ago, noone had ever seen or documented
these spiral eddies, in other words, the normal sort of eddies
have circular currents associated with them, the spiral eddies
have spiral currents associated with them. That came directly
from analyzing photographs taken by astronauts on previous
shuttle missions and to answer your third question, I think the
STS-41G CREW PRESS CONFERENCE 1:30 PM 09/03/84 PAGE 11

fact that we've always made some advance in our knowledge of
ocean dynamics from each shuttle flight tends to argue for the
fact that if you put a ooeanographer up there, we'll continue
that voyage of Discovery.

Tom Knight, WAFF TV for Dr. Scully-Power. To
follow-up on that questioning, in long range, after you've been
able to analyze your data and pictures that you've collected
during the mission. What do you hope this will accomplish in
terms of further ocean and graphic research?

SCULLY-POWER Well I hope It contributes both to the advancement
of the science of oceanography and also for the fact that I think

STS 41-G PREFLIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 11

there's a real pay off from doing oceanography from space.
Obviously, the photographs that 1 take, I will analyze them and
write scientifio papers about them and I think that will open up
the field to a concept that I've been exposing for a number of
years and that is that the next big advance in ooeanography must
come from space.

KNIGHT And secondly in addition to your primary task, do

you think you'll have an opportunity to do any reef observations
or developments or any particular other areas that have been
under extensive research over the past years?

SCULLY- POWER I think that's a two-part question, although you
might not realized it. 1 intend to look at all the oceans that
we are able to see on this high inclination orbit and to try and
document and photograph any significant ocean dynamtos that I
see. I'll also be extensively helping Marc to my left here, in
terms of his (garble) experiments and although I'm not trained in
that particular avenue of science, he has been training me at
least up to the technicians stage so I could be of some help to
h im.

PAO No futher questions from Marshal 1 .

Final question for Bob Crlppen with regard to
things being crowded. How crowded is the timeline on the mission
and how crowded is your timeline as often as you've been flying
since STS-1, are you flying about as frequently as is humanly
possibly or could you do more?

CRIPPEN Obviously, I'd like more. No, I think perhaps

twice a year, depending on the mission and the experience
background is about as fast as we'd want to push it right now for
the near future, from my personal experience. From our timeline,
I think we have a comfortable timeline. I guess I'm having
worked a long time in the space program, back with the Skylab
days, I know we keep getting smart, and about timelines, but one
of the things I think we've learned is that you can make one so
tight that you, you end up acting it as a determent to the number
STS-41G CREW PRESS CONFERENCE 1:30 PM 09/03/84 PAGE 12

of things that you accomplish. What you need to accomplish, all
of your objectives as a comfortable timeline and I think we have
that. There's a number of things being done, but I believe that
our flight planners have done an excellent job of laying them out
and spacing them at the right level.

PAO Okay, we'll go now to the Kennedy Space Center.

Steve Scott for CBC radio. For Marc Garneau. A
couple of questions. First are you trained as a backup for any
of the other people on the flight or are you just there to do
your job and that's it?

STS 41-G PREF LIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 12

GARNEAU I'm just there to do my job, and that's it.

SCOTT Okay, second question. The attention that you're

flight is receiving in Canada, I was wondering what you're plans
were after the flight and if you were going to be doing a lot of
touring to tell your countrymen how neat it is,

GARNEAU Well, I haven't been looking at that in too much

detail, but I have been told that I will be doing quite a bit of
touring before Christmas and after Christmas, going at least to
the 10 providences to each of the capitols, and then to other
cities after Christmas.

That 's all from KSC.

PAO Okay, I understand that's all the questions from

the Kennedy Space Center. We'll return to Houston for final few
questions and then close it. Any questions? This lady here on
the second row.

Linda Koffler, NSI Dial a Shuttle. I guess for
Cathy Sullivan or Dave. What happens if one of you can't make
it. I know it takes two people for a MMU EVA, is there a
contingency person to go out there.

LEESTMA We are not flying the MWU's but we're each, if we

had to, we could do a one-person EVA. I think this EVA, if both
of us can't go out, we will not do this particular planned EVA.
Now on our contingency case, either one of us have been trained
to do any of the contingencies.

PAO Frank Selzer, Cable News Network.

SELZER This would be for either Cathy or Dave. Is the

reason you're working with the hydrazine just because that's what
you'd actually be using later on. Even though there might be a
danger with It, with perhaps it decomposing or some other problem
later.

LEESTMA That's one of the reasons we're using it. I guess

the primary reason is that we, they're trying to gather some
engineering data on xxxxxx compression and the xxxxx or the heat
transfer effects of actually flowing hydrazine and recompress Ing
a tank in orbit. We're pretty familiar with the supply side of
it. I mean we use hydrazine in the RCS and OMS engines and we
know how it flows from the supply side out through the engines,
but what we don't know is if we flowed it back the other way.
And those are, that's the things that we're investigating right
now. And hydrazine, thermodynamical ly, we could probably use
water to do thie. We're demonstrating that we can actually use
hydrazine if we really had to use hydrazine to refuel a
satel 1 1 te.

STS 41-G PREFLIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 13

SELZER And one quick follow-up for Marc would be, was

there adequate time to develope all the experiments, given the
fact that you were notified in April that you'd be going on this
flight, when Canada had been planning for a later flight next
year, Was it adequate time to develope enough experiments for
you to really occupy your time onboard the ship?

GARNEAU Yes, I think that my time is going to be oretty

fully occupied during the 8 days, obviously the experiments to
some extent are tailored to some limitations in the amount of
time that we had to prepare for the actual flight and for the
training and also the available space onboard. But I certainly
feel that the 8 days are going to be v«»?y busy days for me.

PAO Carlos Byars, Houston Chronicle.

BYARS One quick question for Dave Leestma and one for

Cathy Sullivan. Dave on your transfer when you start with those
tanks, both from the incockpit transfers. Would you have one
tank full, one empty, or do you have a partial load in both?

LEESTMA For the very first transfer, we'll have a partial

load in both, that's the way that its launch. It's launched with
90 pounds in one tank and 120 in the other. And that's so that
the very first transfer can be done in one stage and from then on
all the transfers will be done started with all the propellent in
one tank and the other tank empty.

BYARS Cathy, when you're out doing your spacewalk, during

the EVA. Would you be checking these sample plates that are
attached to the Canada ARM, the ones that Mare and Paul will be
photographing, I believe John is scheduled to photograph them
al so .

SULLIVAN No, Carlos, we won't be checking those, we plan to

have the ARM lifted up out of its cradle, and available to look
in basically over Dave's shoulder from a little bit forward and
to port of where we'll be at the work site, to provide video,
STS-41G CREW PRESS CONFERENCE 1 1 30 PM 09/03/84 PAGE 14

real-time video documentation of the experiment. But we don't
plan to go by and inspect the witness plates.

PAO Mike Meoham, Gannett News Service.

MECHAM For Bob Crippen, there is, in conversation of the

two people on the EVA. At what point if ever will be space
shuttle be able to operate with Just one person going outside and
doing the EVA operations. Is that likely in your view as a
commander ?

CRIPPEN Mike, as you're well aware of, for the first four

flights of STS-1 through 4, we were prepared to do a EVA on those

STS 41-G PREF LIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 14

with just one person, the contingency EVA. And as Dave (garble)
earlier, if we ran into a problem on this flight where we
couldn't get somebody out but we had to send somebody out, or we
oouldn't get two people out, but we had to send somebody out,
we'd do so. However, its, the way NASA does business is we like
backups, and baokups mean having two people out there. So from
my standpoint, operationally, it would be unwise to ever plan to
do a single person EVA. If you've ever done anything like soubba
diving, they teaoh you one of the basic things is you start off
with two people and you keep two people. The buddy system is
very important. And will continue to be so as far as
extravehicular activities is concerned.

PAO Craig Colvault, Aviation Week.

COLVAULT I've got two questions, first I'll direct to Crip,

but if anybody else would like to chime in, please do. It's kind
of a perspective on the U.S. space program progress over the last
three years here with shuttle, if you look at Just in the last
year what you did with Solar Max and this week, three
deployments, multiple control centers, heavy satellites deployed
at one time. Seven folks all at one time in a heavy spaoe
transport tooling off, and then pick up a PALAPA and Weststar
later this yoar. How do you, how can you characterized the
maturity right now that you see in the United States Space
Program?

CRIPPEN Well that's an extensive question, Craig,

obviously. In my opinion, we've come a long way. If I could
have envision where we'd be today when John and I launched back
in April of '81, I'd been very pleased. We've advanced
significantly faster than I anticipated. Of course if you
compare it with the schedule that some people were putting out at
that time, we haven't been as fast. So there's, we've onded up
in the middle somewhere, and I'm perfectly satisfied with where
we're at. We're learning more and more about the space
transportation system, how to turn it around fast, but turn it
around safely, and as long as we keep both of those objectives in
mind, we've got a long way to go. And where we'll be three years
STS-41G CREW PRESS CONFERENCE 1 1 30 PM 09/03/84 PAGE 15

from today is probably going to be much further done the road
than even you or I can think up today. Anybody else care to
comnent?

I think we've made great steps forward in the space
program the last three or four years, five or six years since
I've been down here, its been amazing to me. The things that
we've done I haven't even conceived like Crip mentioned the
things we're going to do in the next five years, things we'll be
doing five years from now, we don't even envision right now, I'm
sure. We've done it well, all of our flights have been flown
well, done well and all of us down here are very, very proud of
that .

STS 41 -G PREFLIGHT CREW PRESS CONFERENCE 9/3/84 PAGE 15

An ?. ! guess the second question here, when I , when

i?nH. aor S 8S the ., gpoup> you ' ve got three u - s « N ^y officers,
one Candian Navy officer, one professional oceanographer , Cathy
Sullivan has an oceanography degree I believe, right?

SULLIVAN That's right.

And I bet you Ride"s been swimming at least once a

I was wondering how you were going to get me in the

COVAULT
month.

RIDE
crew.

^n^oL ♦ K Wit \ tf \ Is great ex Perience level, would it be
accurate to characterize even before night that this crew is all

CRIPPEN I won't touch that one.

PA 9, , . , Sounds like these questions are deteriatine fast

vou iii'gjf* tw ?7 r V nd olose '*• Bergman , \n\ I afsu™ '

you'll be upbeat. Jules Bergman.

fJJ?^!!in. 18 there any other way to go with this crew, I was
Just going to ask you a derivative of Craig's question. Looking

^dLn^n'M 1 Said gee ' Crip ' is Captainf or'con^ander , i?s a*
god darn all Navy crew.

RIDE Now wait, sorry.

w?th P you. WeVG g0t 8 C ° Uple ° f civilians that m 'ght disagree

T A ? rtWM «^ *k P kay ' d0 we have anv more actual questions? We're
adjorned, thank you very much.

END OP TAPE

END

DATE
FILMED

STS 41-G CHANGE-OF-SHIFT BRIEFING pi j 10/5/84 7:15 a.m. PAGE 1
PAO

Good morning. I guess the air-to-ground here is going to be a
little disconcerting for a minute or two. But lets go ahead and
forge on with the debriefing and your questions to the Flight
Director for the ascent phase this morning, J. Greene. Jay

Jay

Okay. Most of the time I guess will be questions. There is not
much to report on the ascent. As you all know, we lifted off on
time. We had virtually no problems with the spacecraft
throughout the entire sequence. About the only problem we did
work was selection of a TAL site and I don't know if you heard it
on the loops or not, but we switched sites from the nominal site
of Zaragosa to Maron, also in Spain. That was a preplanned
option we had, and it turned out that the Maron weather was a
little bit more favorable to the TAL operation than was the
Zaragosa weather. I guess the data after launch proves that
either one would have been acceptable. We just picked the
conservative and switched sites.

As far as failures on the spacecraft, we had to fail-off on one
of our RCS jets. It was R3R if you want the nomenclature. We
have a faiJ-off indication — is the differentiation — whether or
not we have a failed jet we will unfold later in the day as we
get a play back of the firing of that jet and the sequence of
events that led to the fail-off indication. We have enough jets
to back it up so either way, it is no problem. We want to look
at the data and until such time as we do look at the data we have
the jet deselected.

The other problem is the problem that was just coming over the
loops as I was getting off shift, and I don't have very many
details on it. I don't think anybody really does. But
apparently there is some tile damage on the right OMS pod. The
crew was in the process of taking the RMS over the pod to do a
tile inspection. Somewheres in the next hour or so they are
going to dump that data to the ground, and the guys will have
time to look at it and get a better feel for whats going on back
there. But that also, we have seen on previous flights and it
shouldn't be any big deal. With that, as I said, everything was
nominal. The SRB's are recovered. Chutes are onboard the
recovery vehicles. We are good shape. Off to a booming start.

PAO

Okay, questions here in Houston first. Give me your name and
affiliation. Okay, Carlos Byar3

V

STS 41-G CHANGE-OF-SHIFT BRIEFING plj 10/5/84 7:15 a.m. PAGE 2
Carlos Byars - Houston Chronicle

Jay, on this OMS pod problem. We are talking here what we are
hearing over loop is a strip two to three feet wide or long and a
tile wide. I sure don't know and I doubt that you would know
right — do you know right now exactly where that is and what the
implications are at all?

Jay

No, I don't and speaking to the guys in the room as I was coming
over here, they are all waiting for the pictures before they jump
to any conclusions. We can speculate on where it is, but

Carlos Byars

Is there any possiblity that this could have important impact or
effect on the Orbiter during re-entry.

Jay

I wouldn't doubt it at this time.
PAO

In the back here, please, George
Frank Seltzer - C&N

Do we know what kind of material is on that OMS pod which tile
Jay

There is both frizzy and standard tile. It is just not clear at
this time where the damage area is. If you wait about an hour,
we will all get to see it on TV.

Frank

Maybe the tile itself or we don't know.
Jay

Don't know.
PAO

Dan Molina, NBC

I understand that you are going to have the indefector camera
focused on the waste water ejection valve when you go through

STS 41-G CHANGE-OF-SHI FT BRIEFING plj 10/5/84 7:15 a.m. PAGE 3

that procedure. Can you give us an idea of when that is going to
be. Is that today or tomorrow or

Jay

I'm not sure where the first dump is scheduled. I wouldn't
assume it was today — tomorrow or the next day.

PAO

Paul did you have something? Paul Recer from
Paul

Yeah, Crip came up regarding some particles on the window so that
he had been told earlier that he had the problem on an earlier
flight, and they didn't gripe enough about it and he was raising
the gripe on the air-to-ground. Do you have any details on that
problem?

Jay

The only details I have during the 41-Charlie flight, shooting
some pictures out the back window, looking out the back window,
there was some snowflake or flakey looking debris in the
window. When we got the vehicle back on the ground, that debris
was no longer present. It's back again. I don't know. It was
definitely obvious in some of the pictures that were taken during
41-Charlie.

Paul

Okay. And this is in the sane window and the same..
Jay

I believe W-10 is the window this time and that was one of the
windows affected on the last flight.

Paul

Okay, any theories as to what caused it?
Jay

I don't have any.
Paul

W-10 is the overhead, is it?

STS 41-G CHANGE-OF-SHIFT BRIEFING plj 10/5/84 7:15 a.m. PAGE 4

Jay

One of the aft windows

Paul

Okay.

PAO

Carlos Byars, again.
Carlos

Yeah, to follow Paul's question. Is that window like a double
paine .

Jay

I believe it is
Carlos

And this is in the gap?

Jay

Yes.

Carlos

Okay. Have the procedures been changed or any equipment changes
to avoid a repetition of the icing situation that we saw on the
last mission.

Jay

The procedures/mission rules are modified slightly to delineate
temperatures at which you would stop a dump because if the
temperatures get any lower you run the risk of a freezing
problem. I think everyone is pretty much convinced though that
the problems on 41-D were pretty much unique to 103 in the way
that the insulation was on the side of the vehicle and with
Challenger we should have no repetition of the 41-D problem.

PAO

Any other questions here in Houston? We'll take one more and go
to other sites beginning with Ottawa, Paul Recer

STS 41-G CHANGE-OF-SHIFT BRIEFING plj 10/5/84 7:15 a.m. PAGE 5
Paul

Okay. On last mission it was speculated that one of the reasons
ice built up is that the flash evaporators were running at the
same time the dump was taking place and force was consequently
reduced by half. Is there a rule now that the evaporators don t
run at the same time you are dumping?

Jay

I don't think that constraint is on the vehicle. The big problem
with 41-D was the interface between the nozzle and the insulation
around the nozzle, the roughness of the insulation in the
vicinity of the nozzle allowing the ice to adhere to the side of
the vehicle. The pressure enters into it in that it changes the
spray pattern coming out the side of the vehicle and widens it at
lower pressures which then gets the spray into this rougher
area. As I said, on Challenger you don't have this rough
interface. It is a smoother interface and we should expect
performance like that performance we saw in 41-Charlie, which is
no problem.

Paul

Oh, you are permitting, if it is appropriate, that the evaporator
and the dump can take place at the same time.

Jay

I don't know what the ground rules those guys are working.
PAO

Okay, we will go to the other sites and come back here to pick up

remaining questions that Houston momentarily while we

reconfigure for Ottawa let me advise you that the Control Center

says they have just scrappled with ERBS and we will go to

Ottawa for questions now,

Monsiour Michelle Downs - Media

Can you tell me what role as Marc Garneau played in the mission
so far. Has he just been a passive passenger so far?

Jay

Well, I'm sure that was the case during the ascent phase and as
the vehicle starts getting established into its onorbit
configuration. He has a rather detailed flight plan of several
experiments that he is going to be conducting. And I would
estimate now he is beginning to work into that flight plan and

STS 41-G CHANGE-OF-SHI FT BRIEFING plj 10/5/84 7:15 a.m. PAGE 6

start conducting those experiments. So the answer is no, he is
not passive at this time.

Monsiour

I have another question. Could this mornings perfect launch and
consequent orbit positioning without a hitch be considered the
finest and most trouble free launch of all the space shuttle
missions .

Jay

Probably was.
Monsiour
Thank you.
PAO

Okay, thank you Ottawa and now we will go to Marshall Space
Flight Center in Huntsville

Dave Dooling - Huntsville Times

Couple questions, Jay. First off, what kind of performance did
you all see with the boosters and main engine going up, was there
anything that was near off nominal?

Jay

Nothing significant. They might have been a little low at
staging, but if you heard the call on the air-ground the call
went up that performance was nominal, which says that whatever
deviations we did have were insignificant. In the next day or
two, they will be analyzing the ascent performance based on post
flight data and reconstructing the exact ascent performance.

Dave

Okay. Second question. With what John just told us about the
RMS scrapple which I believe is a bit ahead of schedule, is
there any possibility that ERBS deploy could go early or would
that jusi: be held until....

Jay

Deploy itself should be held until the nominal time.
Dave

Okay, that's all from Marshall.

STS 41-G CHANGE-OF-SHIFT BRIEFING plj 10/5/84 7:15 a.m. PAGE 7
PAO

Thank you. Now to Kennedy Space Center, Florida
Greg

Jay, I've got three here on the ascent. Can you confirm that you
used 120 degrees of roll off the pad this morning. I was
thinking that perhaps y° u were going as far around as about 150.

Jay

120 sounds familiar, Greg, but I think it is 120. I'd have to
check that.

Greg

Okay. And did you notice anything on adaptive guidance that
affected you in the throttle down. I think you were going for 65
percent .

Jay

Well, possibly a little bit. You know we have a two stage thrust
bucket on this tne. And the pref light prediction was that the
first step in that bucket would be from 100 percent down to 98
percent. In effect we went all the way down to 92 percent which
is indicative of hot performance. Now whether that hot
performance sustained itself over the entire SRB burn period or
whether it was only active in the first few sections is something
we have to find out from analysis. So the answer is that as far
as adaptive guidance, we have to wait and see.

Greg

Okay, understand. Where did you go from 100 to 98 in the seconds
after launch.

Jay

Ah, you got me, whenever we start thv» thrust bucket. The normal
thrust bucket — there is a minimum throttle versus altitude
limitation on the vehicle. And in order to get throttle as low
as we want to be without exceeding the 65 percent minimum
throttle level we throttle in two steps. Allowing the guidance
to take the throttles down as low as it can as fast as it can.
As I say, the two step profile first goes nominally to 98 and
then as soon as its allowed to it goes down to 65. So when we
talk about entering the thi-ust bucket, we are talking about the
first step of that throttle process.

STS 41-G CHANGE-OF-SHI FT BRIEFING plj 10/5/84 7:15 a.m. PAGE 8

Greg

Okay. And one last question here. At main engine cutoff, is it
correct that you were going for velocity of 25-725. Why I raised
it, I thought I heard Crip call 25-715.

Jay

I think Crip called 25-750. And its not clear that he was
calling that off a digital or calling it off a tape meter. I
would assume the later. And that's pretty consistent in the way
it works in SIM's. I think our MECO cutoff velocity was just
about right on.

Greg

Okay, so don't pay a lot of attention then to Crips call based on
the fudge factor depending on what indicator he was looking at

Jay

That's right.
Bill Hines

At the post launch briefing here at the Cape, they told us to
defer this question to you people in Houston. So, have you some
orbital parameters that you can give us now and also the orbital
period .

Jay

Well, I could have said yes if you stopped after the first
half. Apogee right now is 191.7. Perigee is 190.4. We are
essentially circular.

PAO

I've got period. It's one hour, 31 minutes, 39 seconds from the
MOCA.

Kennedy

That's all the questions from Kennedy.
PAO

Okay, back here in Houston. Anybody have anything further?
Yes sir, your name and affiliation.

STS 41-G CHANGE-OF-SHIFT BRIEFING plj 10/5/84 7:15 a.m. PAGE 9
Bob Paterson - News Radio Toronto

Somewhat of a — its a non-technical question. In view of the
large crew and the amount of time it takes them in zero g to do
routine housekeeping, eating, sleeping, etc., is there enough
time allotted for people to relax at all and not get m each
others way. There is sufficient room, time,..

Jay

Well, I think the flight plan is laid out and demonstrated
th«-ouqh the simulation process we go through during .he
preparation for a flight. This being the largest crew, we will
have to see how it wo?ks out. But figure that the crew can take
care of themselves and work things out so that they do get the
relaxation or free time that they require. If it s any
indication, right now they have been running ahead of the time
line all morning.

Bob

One supplementary question. If you are going to run crews this
large in the future, is there any thought to putting them on
shifts something like spacelab did.

Jay

We'll go to shifts when mission profile and mission needs require
shifts! Otherwise it is probably better to work the vehicle with
everyone up at the same time.

PAO

Carlos Byars again, Chronicle
Carlos

I assume that the figures you gave us on apogee/perigee are
nautical miles.

Jay

Ahuh.

Carlos

Okay. Back to the icing problem. It seemed you had an incident
before which there was a lump of ice formed and then went away
and dinged an OMS pod. But was that not on Challenger?

STS 41-G CHANGE-OF-SHI FT BRIEFING plj 10/5/84 7:15 a.m. PAGE 10
Jay

That was on Challenger, and I think the probllem we had there, we
were doing simul dumps — simul waste and supply. We have stopped
doing that, and I think is one of the things that led to the
success we had on 41-Charlie. We have also done other things
like preheating the nozzles more than we had in the past — both
predump and after the dump is over.

Carlos

That's what I've been trying to get at.
Jay

There have been a lot of corrective measures taken trying to
avoid subsequent icing problems.

PAO

Further questions? Okay, if not I guess we are finished. Thank
you very much. Thank you, Jay.

END OF TAPE

STS 41-G CHANGE-OF-SHIFT BRIEFING p2j 10/5/84 7:45 p.m. PAGE 1

PAo Oaky, we're on the air. John, go ahead and start

your summary over again for Flight Day 1 activities.

Cox Okay. This has been one of the more interesting

shifts, I think, that I've ever worked on. Murphy has a funny
way of getting to you. We had a very good ERBS deploy today;
however, it took us quite a while to get there. We ran into some
solar pointing problems with some ground-based antennas which got
us behind the timeline and it remains to recover from that. Of
course, we had to complicate it with a few procedural errors on
the ground. But we managed to catch up on the timeline and then
came to deploy time, the old nemesis of thermal got us on-orbit
and we had some very cold array temps ,and it appeared that that
was the thing that caused the delay on that first orbit of
getting the ERBS deployed. That was fixed with some warming
attitude maneuvers for the ERBS satellite. We then found out
that Murphy came in again and helped the ERBS folks out with a
command load that they had put in, which would have allowed their
steerable antenna to point to the TDRS, and it turned out that it
didn't want to point to the TDRS. So we troubleshot that for
another orbit until we found the error in that and got it fixed,
moded right, and the ERBS deploy itself worked beautifully.

As everybody was patting themselves on the back and feeling good
about that activity, the Ku-band antenna quit on us this
evening. We spent about, oh, a good half of the last TDRS pass
with the crew, troubleshooting it. It appears that we've lost
power, at least power out, on the antenna and we're having
trouble commanding it to positions. It doesn't seem to want to
go; it appears to wander and hunt. Folks aren't going to give up
on it, it does seem to maintain its interface with the computers
and we can talk to it. But it's not clear what language we're
supposed to be using.

As far as the other things that have happened today, I think
you're probably aware we did have a jet failure early in the day
and we have confirmed that it was a fail off condition.
Apparently, the oxidizer valve did not open when the jet was
commanded on. We have plenty of redundancy in those jets. There
happened to be a yaw jet in the back end on the right side,
that's in good shape as far as redundancy is concerned. We'll
just put that to low priority in the firing sequence and we won't
require that one.

As far as the tile, the missing tiles that were seen on the OMS
pods. On the left pod, which had the small ding, that's been
analyzed to be no problem. And the right side, there is a strip
of frizzy missing. It happens to be a transitional layer of
frizzy that was put in as the interface between the tiles and the
large sheets of frizzy material. We do not anticipate any

STS 41-G CHANGE-OF-SHIFT BRIEFING p2j 10/5/84 7:45 p.m. PAGE 2

significant problems with that; however, there will probably be
some form of damage anticipated to the - it's a delamination type
of thing that happens below that tile surface. We'll have to
evaluate that after the vehicle lands and take a look at it. We
have had tiles missing before and have had that type of damage.
The size of the area that we are working with is a little larger
than we've normally had, but the temperature readings that we
expect to see in that area are not too awful high. So we don't
expect any big damage, it's just some minor delamination, call it
minor. It will probably be some sort of an impact with the
ground folks in preparing the vehicle for the next flight, at
least it has that potential. I think with that I'd be willing to
take questions.

PAO Okay. We'll take questions here first. Up front.

Please give your name and affiliation before you speak.

RECER Paul Recer, the Associated Press. Crip seemed

somewhat surprised at the sound of the tape recorder that they
were using, the data - high speed data recorder, or whatever they
call it. And they later tried to construct, apparently, some
sound chamber or something. Wasn't this thing tested on the
ground? Or why did this come as such a shock or surprise to him?

COX Crip wasn't at all surprised. He felt that we would

be surprised. He had warned us preflight that he anticipated
that to be quite loud and with - trying to operate that recorder
during the night, they had a concern - the reason they had all
that thermal insulation with them was because they anticipated
having to try to muffle that if the noise was reasonably loud.
When they did play, the noise still is on the air-to-ground.
They configured it in its loudest mode, which you wouldn't be
using during the night, but just to show us that it does make a
significant amount of noise. And when you're trying to sleep,
that may be very annoying since it's coming and going and coming
and going as you start and stop the tape. We further queried
them whether or not they thought that was going to be a problem
for sleep. And he said, "No, we're going to go ahead and try it
and we're going to try to put this insulation on it." And they
reported this evening that they had done that, so that's the way
we're currently taking data during the night. We're limited by
the amount of tape that's on the recorder, but that's the way the
SIR-B will be collecting data during the sleep period since the
Ku-band antenna is not working.

RECER Where is it?

COX It's up on the flight deck. It's on the back end, I

believe it's down low on one of the subpanels on the flight deck.

STS 41-G CHANGE-OF- SHIFT BRIEFING p2j 10/5/84 7:45 p.m. PAGE 3

RECER Right behind where Crip sleeps, huh?

COX Well, it's not too far away.

REMOFF Frank Remoff from the Los Angeles Daily News. The

solar radiation experiment, was that activated? I know the
antenna went up, but —

COX Oh, the SIR-B?

REMOFF Yes .

COX But that looks basically at the ground. The SIR-B

antenna was unfolded and opened up and we saw some funnies that
some people anticipated and some didn't. There's a little
hunting that the antenna has as it opened, and it took them a
little while to get it laid out flat. But it's all opened up and
it appears to be operating fine.

REMOFF One other question. Could you review the redundancy

that you have with the - if you lose this Ku-band antenna for
good? I know you haven't given up on it, but

COX For redundancy, as far as Ku capability is zilch.

There isn't any more redundancy as far as that's concerned. We
do have the high data rate recorder, though, and a certain number
of tapes on the order of 7 to 10, or something like that, that we
can put on the recorder and record high-priority passes
throughout the flight. Wouldn't be able to acquire all of the
data you wanted. In addition, there's an optical recorder that
is part of the SIR-B system that they can additionally put more
data on. That's kind of the way we ran when we were in the SIR-A
mode back on flight 2. We didn't have a Ku-band system in those
days, so we'd be back into spotty data takes, as opposed to lots
of data takes like we had planned on. And I have no idea what
that means, data take impact-wise.

PAO Go ahead, Frank.

SELTZER Frank Seltzer, CNN. That's what I was going to ask

you was about, what's it going to impact. Because you have a lot
of data that's going to be coming back down from SIR-B and I was
wondering, if you don't get Ku back up, what that was going to do
to you.

COX Well, it definitely affects the SIR-B data. That's

the whole reason the Ku-band system is on this flight. We have
not asked for an impact yet, we're still troubleshooting the
antenna, and the night operation was going to be a - since we're
in ZLV attitude, you don't get a great deal of good Ku-band
coverage in that attitude, so the nighttime was primarily going

STS 41-G CHANGE-OF-SHIFT BRIEFING p2j 10/5/84 7:45 p.m. PAGE 4

to be set up with recorder passes and some Ku. So tonight's data
takes are, the impacts are probably small compared to what may
turn out to be the problem throughout the rest of the flight.
However, the Ku-band folks have all come in and they are working
on trying to troubleshoot this thing. And since it's that
probably power quit, or something like that, it's signatures that
people just don't understand. Possibly, the people can figure it
out during the night and get us back operating tomorrow.

SELTZER The antenna is still locking in, isn't it, at

times? It's still locking into TDRS, isn't it?

COX No, it's not.

SELTZER Not at all?

cox , We cant' control where we want it to go. We're

acquiring data through the S-band system, maybe you're confusing
them. The Ku-band system that you might see, the TV passes when
we're not over one of the typical GSTDN passes. And then what
you don't see is the 46 megabit SIR-B interface where data is
shot down to the ground. We don't display it and don't talk
about it in real time, but it's displayed and processed for the
JPL folks.

SELTZER One other question. On the damage to the frizzy, do

you have any idea what kind of time delay that could mean? Would
that push back maybe !.he DOD flight in December?

cox 1 don't know. I'm sure people are working that to

try to understand it. And hopefully, it won't make any impact.
But there's no good strong assessment of how much damage we might
get. The range seems to be from very minimal to enough that you
might have to change the pod out. So people are working, some on
the worst case scenario; some people think that there's just a
partial little fix that you can do on the front of the pod. So
the range is wide and I'm sure it ranges all the way from no
impact to some, but I don't know what the some is.

PATTERSON Bob Patterson, News Radio. Would the delay in
deploying the ERBS satellite have any impact at all on Marc
Garneau's space vision system experiments? Or would it enhance

cox He gave a report tonight that sounded - I didn't, he

uses a lot of code words and whatnot, I didn't get the book back
out to translate everything, but it sounded like he got most
everything VISAT-wise that he was hoping to get with the ERBS.
Basically what he needed was a good deploy with the cameras
pointed in the right direction and all that. And he did qet all
that from what we could tell.

STS 41-G CHANGE-OF-SHIFT BRIEFING p2j 1.0/5/84 7:45 p.m. PAGE 5

PAO Further questions here? Go ahead, Paul.

RECER On the frizzy that came off. It's right at the

interface there? Is there any concern about a zipper effect or,
you know, with that there at the front allowing the rest of it
just to come on off?

COX That's a good question. We talked about that

some. That interface is there - that separates some tough tile
that's on the front of the pod, that has been put there to take
any type of impingement damage. That's tile that you can impact
and not cause any significant problems. It's much thicker than
the original tiles that we first put on the OMS pods. Then
frizzy blankets that appear behind those tiles have been attached
and have flown several times and are in good shape, and we don't
expect any peel-back there. This was just sort of a joint
filler, happens to be about 5 or 6 inches wide, and, as you saw,
probably about a 2 to 2-1/2-foot strip there. That came out and
they're going back and looking, trying to understand why that
might have come out. There's an outgassing tneory that they have
helped lift it a little bit, could have been impinged upon by
something similar to what the other side had in the small ding
that may have started it to peel up. Along the peel-up story,
though, if you noticed, there was another piece next to the one
that did come off that has an edge turned up on it. If it was
applied in a similar manner as the first one, and if it has a
similar problem the way it was applied, and if that's the answer,
then we would expect that one to have a pretty good chance of
peeling up also. But again, the analysis that people have looked
at shows that that won't cause any more concern entry-wise than
the one missing piece already has.

PAO Any more questions in Houston? One right here on

the front.

REMOFF Frank Kemoff from the Daily News of Los Angeles.

The SIR-B experiment, did you miss any passes? I think there
were supposed to be

COX There were some engineering data take passes where

we were trying to set up thu system and understand it a little
bit at the beginning. Those were missed due to the delayed ERBS
deploy activity. The intent was to try to pick those up tonight,
they're a higher priority than some of the other data takes that
they had planned. With this Ku-band thing coming up late in the
game, I don't know where all that stands at the moment, but that
was the intent before that problem showed up.

PAO Okay. We'll go to KSC now, I think we have a

question there.

STS 41-G CHANGE-OF-SHIFT BRIEFING p2j 10/5/84 7:45 p.m. PAGE 6

HARWOOD Bill Harwood, UPI. I wonder what the status of the

Orbiter fueling system experiment is tonight.

COX The way I copy the question is what's the status of

the ORS? The ORS reports that we had back are all that that
system is very nominal, there are just a couple of transducers
that are acting up. We had seen some erratic performance out of
some of the transducers on that system in some ground tests, so
we were aware that that might happen. We're seeing a little bias
on the two flow rate transducers in the system. It's not any big
concern, but we just noted it.

PAO Okay, we understand there aren't any questions from

Ottawa, so we'll come back here and wrap it up. Go ahead, Paul.
Right here in front.

RECER Under the ground rules, do you need the Ku-band

antenna for the spacewalk?

COX No. Not at all.

PAO Then back here on the third row.

PATTERSON Bob Patterson, News Radio. One of the things I
think the Canadians may have been expecting was that their first
astronaut to go up, and that they would hear him commmuni eating
with the capsule communicator. Could you just sort of elaborate
on the role of the Mission Specialist and why he's so quiet in
communications?

COX Okay. He is the Payload Specialist, and he did come

down on the air-to-ground report. From the training and the sims
that we went through for this flight, that's all he'll basically
be doing each day, that we can tell, is giving an evening status
report of all the different activities he's performed during the
day. He doesn't give us a blow-by-blow as it goes on, but he has
a - since these experiments he's performing don't generate data
that we see in telemetry, then he gives us at the end of the day
a status of how all those experiments ran. And that's what he
did this evening.

PAO If there aren't any more, we'll wrap it up. Thank

you very much for coming out tonight.

STS 41-G CHANGE-OF-SHIFT BRIEFING p3j 10/6/84 11:30 a.m. PAGE 1

PAO Good morning and welcome back. Let me introduce the

principles here beginning at my immediate right: Cleon
Lacefield, the off going Flight Director from the orbit 2 team to
debrief his flight shift; Doctor Shelby Tilford, Director of
Earth Science and Applications at NASA Headquarters, to discuss
the SIR-B system and the effects the Ku-band is going to have on
his data tapes; and Ron Brittoner, Deputy Manager for ERBS at
Goddard, to discuss the deploy and currrent operation of ERBS,
and we will begir with Cleon

CLEON Okay, we started out this morning trying to get the

Ku system back up and operating. Doctor Cox, I believe, informed
you last night that just before we went to bed last night, the Ku
system went down, and we took the system to standby and we did
all our SIR-B data tapes during the night on the high data rate
recordersds. This morning we worked up some procedures to check
out the Ku-band antenna. We verified that the antenna will work
in the radar mode. It will also work in the COM mode, but every
time we turn it on, what happens is the antenna starts going
through these occilations. What we figure has happened is that
the electronics or the encoder is not getting the correct command
so that when we try to get the antenna to go to where we want it
to go it just does its own thing. There are two gimbals on the
antenna, there's a beta and an alpha. And when you look at this,
if my hand was the dish, the beta is the own that would tilt the
antenna like this. The alpha is the one that tips it all the way
around like this. The alpha is the one that is driving all the
time. The beta is locked, and we figure it is locked at the hard
stop, after we did the check-out and verified that it would work
in the COM mode. We are now evaluating an INF procedure, and
inflight maintenance procedure, where we would go in and pull
power to this alpha antenna so that what we can do is we can
drive it to where we want to put it, pull the power to the
antenna, and then we will point the orbiter and the antenna
toward TDRS. That way we will be able to attempt to dump the
high data rate recorder so that we can retrieve the SIR-B data.
The team on council right now is evaluating the INF procedure.
It is approximately an hour to an hour and a half procedure to
get to where we can pull the power to the antenna. They are
talking about either doing that this afternoon or tomorrow, and
I'm not sure where the flight team is going to be able to go with
that. And that depends on when they canget the procedure
verified. If that is the case, we are working up the procedures
so that we can point the orbiter towards TDRS. We think we know
where the antenna is as far as beta. We can still read where it
is in alpha. And we think that we will be able to point the
antenna towards TDRS. We have a target that is a degree and a
half wide in diameter that we are trying to point the antenna
towards the TDRS. So we will put the orbiter into deadband
during the 20 minutes that it takes to dump one of the recorder
tapes. The team is also evaluating another means of coming up

STS 41-G CHANGE-OF-SHI FT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 2

with pointing for the antenna, and they are discussing that right
now, and I'm not sure what that envolves. But the Enco's do
think that they know where the antenna is with a degree, and
that's what they need so that they can point the antenna towards
TDRS. At the current time, and I'll let Doctor Tilford talk
about this in a minute, we have 7 tapes on board for recording
data for the SIR-B. Those are 20 minutes tapes. We have
already used up one, and the only way we can dump those tapes is
through the Ku system. They also have 8 hours on there optical
recorder, and the team is evaluating what that impact is and, I
believe, Doctor Tilford has that impact, but we hope to get to a
mode either this afternoon or tomorrow. We will be able to take
power off that antenna and point that bird towards TDRS. Just as
I was going off shift, you might may have heard that they were
having trouble with SIR-B. What we do is before we do an OMS
burn we are doing an orbiter just maneuvers. Two of them this
afternoon are scheduled. We are going to come down from the 191
to the 147 nautical miles. When they were storing the antennas
they had trouble. The couldn't get them all the way down and
latched so that they could latch the antennas before the OMS
burn. What it looks like is that they are just a little bit off
so that we don't have enough room to make the microswitches that
allow us to go ahead and capture with the latches. The team is
working that problem right now, and I believe they have postponed
the first OMS burn, but they have all day today to get those OMS
burns off to be in the proper phasing to continue a nominal
mission. For the Canex people, they did do the orbiter glow
experiment this morning and we should and did pass some
instructions to Marc this morning on camera angles for the
orbiter glow experiment and we should get an evening status
message this evening from him discussing how the data tape went
today. And with that, I will open it up for

PAO Well, I want to take a couple of other statements

first. We go next to Mr. Brittoner to let him brief on the ERBS
status

BRITTONER Okay. Right now let's start with where we are. We
are flying very freely. The control center at Goddard is taking
passes every TDRSS pass, and we are monitoring the status.
Spacecraft is nominal. That's not a very good word. It's really
great. Everything is working just like we wanted it to and as we
planned. Now to go back through our launch phase. Right up
through the time when we wanted to do a contact with the TDRSS on
about orbit 4, things were going fine. During the attempted
TDRSS pass in bay, we were not successful, and our plan was to
pass right by that and if it wasn't successful continue on with
the deployment. What happened is cause we missed it, we also
missed loading the ESSA antenna controller, that's the round ball
antenna that we have. And we did that a little later. And when
we did it a little later, we didn't do it quite right so there we

STS 41-G CHANGE-OF-SHIFT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 3

were with the only problem we knew of, of the ESSA controller was
not going to be tracking and directing the beam toward the TDRSS
properly. But everything else was quite nominal. Up until the
time Sally hit the switches to deploy the -Y solar array. Now we
proceded with our backup procedures which was to send redundant
commands to release the array. And what we believe happened,
what we know happed, it that the very first command that Sally
sent did in fact release latches on the array. The only thing is
the hinge line — the hinge mechanism — was bound up some how.
When we sent the back up, we just simply released the other side
of the latch so we didn't add to the — we didn't improve the
situation at all. Then we went into a — we had a flight rule
that if this happened, that Sally would go in to what we call a
solar ray back drive. She had used the RMS shake her spacecraft,
which she did, and that didn't give us any joy. So as we were
about two thirds of the way through that TDRSS pass, we knew that
the arrays had some pretty drastic temperature differences. So
we asked that Sally to maneuver ERBS such that this array was
looking directly at the sun. She did that. The minute she did
that, we could see all the temperatures start to climb. And
about the time, it must have took about 15 minutes, and about the
time they were all up getting close to room temperature, you
heard Crip make the call that he saw the array begin to move.
This time we believe Sally was giving it a little bit of nudging,
and boom, it went up and locked. And we deployed this array and
we deployed the ERBS antenna, and we were completely deployed
everything latched up as perfect. But we still had the problem
of not having the TDRS ESSA antenna tracking the way it should
be. We had discovered our error and we were ready to fix it. We
asked John Cox if we could go one more orbit and he says okay.
We loaded the new load in and it worked very fine. We were
right on target, but when they released us then on the next pass,
orbit 8, which was two orbits behind where we wanted to, she gave
us a most gentle tip off that you could image, point 01 degrees
per second. Which was well within what our attitude control
system could handle. We didn't have to do anything to it, and as
a matter of fact, we didn't do anything to it until late last
night. Has to check to make sure that the other part of che
attitude control system is working. So right now we are flying
at the release altitude. Tomorrow we intend to give it a one
minute test burn of our orbiter adjust system. We'll use four
little half pound thrusters up here to start our orbiter
adjusting to the 610 kilometers circular orbit we want. Do a two
hour two orbit caliber tomorrow. And Monday we do a long burn, a
little over 6 hours. Tuesday we will do another long burn,
almost 5 hours. And then Wednesday, Thursday, and Friday we'll
trim it in just to be perfectly on to the 610 nautical miles
circular orbit where we will remain the rest of the rest of the
life of the spacecraft. We will have to tweak that every now and
then. We plan to use the next 3 days to check out all of the
subsystems in every mode that we can. The instruments are going

STS 41-G CHANGE-OF-SHI FT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 4

through their calibration procedures. In about 14 days we'll pop
the contamination covers off of the ERB instruments. We'll
probably pop the one off of the SIRs a little of the thage a
littler earlier. Then about 30 days we will be in full bore
science thinking activity. I do want to thank all the people at
Goddard that are back in the control center operating ERBS, and
will be operating ERBS now for the next two, three, four, five
years. Have done a fine job of planning and being able to
operate this satellite. But for US/ for me here today , we want

to thank the crew at Johnson, astronauts, control center crew,
particularly our payload interface manager, who is with us today,
Wayne Eaton, in the back of the room. J. Apto is our ascent
payload officer and Michelle Bracky, who is in the back of the
room, is our payload officer through all this, and if you heard
on the links, she just nursed us right through all this. And of
course Sally, who did the RMS stuff. And that's where we are.

PAO Okay, thank you. Doctor Tilford and the SIR-B.

TILFORD Thank you. Let me briefly say first that the other

experiments of OSTA-4 seem to be working extremly well. The
large format camera found that 'all, see to be working excellently
and we are right on timeline with most of those. With respect to
SIR-B, making the assumption that we do not get the antenna
fixed, it will reduce the amount of scientific data we achieve
from the mission by an appreciable amount. We have looked at re-
timelining the missions such that and have identified essentially
ten primary sites out of essentially 60 we had. The amount of
data we will get from seven full tapes is about two hours and 20
minutes compared to the approximately 40 hours we would get if
the antenna was up and working in its full operational mode. But
we do think that the amount of data we get back will be very
useful. It will give us much of the information that we had
hoped to get. We in addition to the digital data, of course,
have eight hours of optical recording. We will try to provide
some data to each of the principle investigators. It indicates
the optical data doesn't have the fidelity and quality that the
digital data does, but we do think based upon looking at
timelines, that we can provide something to almost all of the
principle investigators. And for the ten primary areas that havf;
been identified, we will get somewhere between 160 percent for
those particular objectives. I think we're hoping that the fix
is found for the TDRSS, and if that's the case, then we will get
most of the objectives we set out to do. I think I will leave it
there for questions.

PAO I think I will take questions first here in Houston

and subsequently at the other centers. Frank Seltzer from CNN.

SELTZER Frank Seltzer, CNN. Doctor Tilford let me just

clarify again. Now you said you would be getting about two hours
and 20 minutes, that's strictly on the tapes.

STS 41-G CHANGE-OF-SHIFT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 5

TILFORD That's on the digital tapes.

SELTZER If this procedure is successful in pointing the

orbiter towards TDRSS and being able to off load some of that
information, what do you think your goal is going to be at that
point if you get that operational.

TILFORD We would expect it would probably be somewhat

greater than 25 hours.

PA0 Okay, Carlos, did you have something? Carlos Byars

from from the Chronicle.

BYARS I'm wonderingif there is some mechanism by which the

crew that's controlling the shuttle can see how close or whether
or not they have actually gotten a lock on with TDRS. How does
this work? Is there part of some sort of feed back mechanism
whatever that they can judge when they are properly aligned with
TDRS or how closely, how much more they need to move in some
direction.

LACEFIELD We are evaluating that right now. We do believe we
will be able to see— we definitly can see when we are locked
up. And as far as if we are on the edges, what we are doing is
we are looking at the procedure on— okay, if we are on the edge
and we just haven't acquired, we are looking into the procedures
to just rotate the orbiter through the deadband so that we come
through that little target and that is being done right now.

PAO Your name and affiliation, please.

MARK SIXSTRUM from CTB News in Canada Canadians of

course are eager to see more of their first man in space, and I
see that there is no mid-deck TV activity scheduled today. Is
NASA planning to adapt that plan a little bit so that we can get
some pictures of Marc Garneau today?

LACEFIELD Ahh, I'm not sure what the plan is for the next
couple of days. Part of the problems that we had today where we
were trying to come up with a solution on the Ku antenna and that
—and the Ku antenna has taken some data slots that we would
normally have with the crew, and as soon as we can get that
figured out, we will be back on our nominal schedule where we
will be doing the crew scenes.

JULIE O'NEAL of the Canadian Press Can you tell us more about
the lack of data that may result from the current situation.
Especially in geographical terms in what you won't be scanning.
Scientist around the world are expecting a lot

STS 41-G CHANGE-OF-SHIFT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 6

TILFORD Yes, in the ten primary sites that I mentioned, what

ocean purposes, geology purposes, etc. Reducing from 40 hours to
2 hours to 20 minutes certainly will have some impact on the
geographical coverage. However, we have tried to identify areas
in each of the primary areas of interest such that we will get
back information on the performance of SIR-B with respect to the
various displants who are interested in the mission.

O'NEAL Can you explain that to us in geographical term —

miles or something like that.

TILFORD Ahh, in terms of absolute coverage, no. We have

identifed a number of passes to look at the same spot at
different incident angles or depression angles. And in some
cases we will be looking at as many as five angles and other
cases only one or two, depending on what the objectives of the
experiment are. As I say, we did have about 60 areas originally
identified that will be reduced to ten so that cuts down the
geographical coverage.

O'NEAL Do you prefer to call that a major disappointment.

It seems to be one of the main three purposes of the mission.

TILFORD Well, it's a disappointment, yes. I think it really

depends on how much of the scientic goals and mission objectives
goals that are actually accomplished, and we still have our
fingers crossed that we will get the TDRSS antenna working. If
that's the case, then I would look at it as being an impact but
not a disappointment.

PAO And before I take another question, as regards your

question about cabin TV, there will be a TV pass tomorrow morning
9:25 A.M. central time on orbit 35 through Hawaii of cabin TV and
I image Marc will probably squeeze in there somewhere. Tell me
your name and affiliation, please.

DAVID DICK with CBS Mr. Lacefield, can you give us a sense of
the accumulative effect that we are witnessing here is this a
situation where you have a number of little problems that might
conceivable through other things out of sequence or having to
slippage of time.

LACEFIELD With what we got going on this afternoon, we do have
time — we have evaluated — we have the commander and John McBride
available this afternoon and tomorrow morning to work this IFM
procedure as far as the Ku. That is — will be done on the mid-
deck. The ORS tranfer which is schedule this afternoon will be
on the flight deck so that won't conflict. So we are working
these into our timeline. And so far we are doing pretty good.

PAO

Okay, and Dan Molina from NBC.

STS 41-G CHANGE-OF-SHI FT BRIEFING p3j 10/6/84 11:35 a,m. PAGE 7

DAN MOLINA How confident are you that you are going to be able
to solve the SIR-B antenna latch problem. Does that seem like
something you understand at that this point, and if you can't
solved it what happens then?

LACEFIELD I'm not sure about that one. That just happened as
I was coming over here and I know the flight team is evaluating
that. There are thermal effects that effect the antenna. They
are trying to see whether maybe they can either cool it down or
heat it up so that it will not be warped and it will go all the
way together. And they are evaluating several options and it is
kind of premature at this time to figure out where they are going
to go with them.

MOLINA We got a reference last night to Murphy's law being

in effect on this flight. Is that your feeling to?

LACEFIELD Well, with the Ku band antenna, at least we have it
figured out to one problem, which is the encoder problem. Last
night when John vent off shift, he wasn't sure what was available
with the Ku antenna. So at least we have narrowed down some of
the Murphy's.

PAO Paul Recer, Associated Press

PAUL RECER Yeah, Mr. Lacefield you said that one solution of
the Ku-band antenna may be pulling a cable and that you are
working out procedures right now. Can you roughly describe what
procedures you are talking about. Are they going to have to get
into the wiring?

LACEFIELD Okay, what we are talking about is pulling one cable
on the mid-deck and to get to that cable we are going to have to
pull some lockers. And the procedures itself for pulling the
cable is easy. It's pulling the locker out of the way to get to
the cable that's the time consumer. And it's only one cable
that we are talking about.

RECER Okay, can you relate that locker to some other well

known location on the av

LACEFIELD Ahhh, I would need to check on that. I believe it's
av bay 3 that we are talking about

RECER Okay, and what is involved in pulling a locker?

LACEFIELD What's involved with pulling locker is you have to
release the bolts that are holding the locker, pull it out and
then you are back there behind it. You have to pull it out of
the way--that section of the locker.

STS 41-G CHANGE-OF- SH I FT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 8

RECER And one other thing. Since you have a space walk

anyway, is there any fix that the space walking astronauts could
administer to the Ku antenna or provide you with additional data
for repairs or anything

LACEFIELD Okay, the way the system is right now, with the
antenna oscillating every time we turn it on, we have to pull the
power to it in order to use it. And we can not pull the power to
it on EVA, it has to be in this plug that we are talkling about
pulling to keep it from oscillating. Until we stop it from
oscillating, there isn't anything you could do with it on EVA.

PAO Okay, your name and affiliation, please.

FRANK GREENWALT from the Daily News in Los Angeles I know it's
early, but is there any consideration going to be given to
shortening or lengthening the mission because of the SIR-B
problem.

LACEFIELD Where we are at right now is that we are still
evaluating how long it will take us to get the fix. And then
once, if we do get the fix, what that is going to do for us as
far as total data that the SIR-B people can get. And that is
all in the process of being done right now.

GREENWALT Also could we get — could you give us later some
indication of what the geographical areas

LACEFIELD Certainly we will make that available depending upon
the out come of this.

PAO Your name and affiliation, please.

LEE DYE of the Los Angeles Time What effect does this have on
your fuel. I would think you would burn quite a bit maneuvering
the orbiter to use it as a pointing instrument. And also what
does effect does it have on all the instruments to be able — if
you have to change the attitude of the orbiter quite a bit.

LACEFIELD Well, as far as the fuel on board we have a lot of
gas on board that we could use to point the vehicle. That would
not be a constraint.. As far as the timeline for scheduling
it around the other experiments, that's work we that would have
to do, and we would schedule around the other experiments with
the minimal impact so that we could do that.

PAO John Gibbon

JOHN GIBBON So we understand where you are at, could you give us
a kind of a summary of all the obvious "what if" questions that
we keep asking here. The what if the latches don't work, what if
the antenna, what are the odds that you are either going to

STS 41-G CHANGE-OF-SHIFT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 9

length/shorten, say lets give this up and try another day.
What? There are a lot of variables there, and we keep asking
about them individually, where does it stand in total?

LACEFIELD Okay, let me take them one at a time. If we are
able to fix the antenna, the IFM works feasible, and right now it
does. That will be over in the next day, either this afternoon
or tomorrow morning. Okay, if we go ahead and fix that, then we
have got the problem with the antenna, in its present state we
cannot do OMS burns with. And hopefully, this afternoon the
flight team will have an answer on stowing that antenna. And I
believe they have got some variable options to stow that
antenna. That goes okay if they can stow the antenna, then we
will be back on schedule in the next day or so. And we are not
talking about lengthening or shortening the flight.

GIBBON One last detail question. Can you re-enter with

that antenna unstowed or would that be a really serious for you
towards the end of the flight if it were not dealt with.

LACEFIELD We do have a backup mechanism for essentially firing
pyros such that we can latch the antenna. The problem in doing
that is that we can do longer unfold the antenna so that's an
effort of last resort. As far accomplishing the science of the
mission is that we would like to look at all the other options
before proceding with that one. We can latch it for re-entry.
There is a backup system to do that..

PAO Mike Mechum from Canut

MIKE MECHUM That was one of mine, but Doctor Elachi said
yesterday for instance that the with SIR-B they would be viewing
40 percent of the land mass in Europe as one example. Trying to
get back to getting a feeling of just how serious of a hit this
is if we go from the 40 percent in Europe. You figure where are
we now in the European example.

LACEFIELD Well, lets for the total solid earth, yes, it was
approximately 40% because one of the primary objectives is to
look at multiple angles reducing from the 40 hours to the 2
hours. We would put as high priority to the revisit so we would
reduce the total global coverage probably by a factor, and this
is only and estimate, but I would say 80 to 90 percent because
the relooking or looking at the same place from different
depression angles is an extremely important objective for the
SIR-B mission.

MECHUM Am I correct that one of the main reason why this

mission is eight days long is to give you long streches for your
SIR-B data gathering. Isn't that correct?

STS 41-G CHANGE-OF-SHIFT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 10

LACEFIELD That's one of the objectives, yes.

MECHUM So it would be a major disappointment for the full

length of the mission if you can't get adequate SIR-B.

LACEFIELD Well, if we don't get additional data beyond the two
hours and 20 minutes that we have tapes on board for without any
playback capability, it will be major disappointment.

PAO Okay, right there, please.

JACK HUBBAR - CBS NEWS Mr. Lacefield, is it possible to give a
— this is a pick up of John *s questions — the health report of
the mission. I mean, there seems to be a variable here. If you
are able to solve all the problems, you are in pretty good
shape. If you are not able to solve all the problems that you
are working on now, you are not in good shape. Could you expand
on that a little bit. If you can't solve the problems now, what
kind of condition is the mission in?

LACEFIELD As far as the flight goes, we are in a ORS
experiment, we will be able to do that, we will be able to do the
EVA, we will be able to take the large format camera, data takes,
the file, the maps, the only thing that is going to be impacted
here is the SIR-B. So everything else is going fine. The
spacecraft is very healthy, and it's doing well. We have plenty
of prop on board and the crew is feeling good and taking a lot of
pictures for us. Except that we are looking at a lot of Ku
antenna stuff right now. Other than that, they are doing great.

PAO Your name and affiliation, please

HAROLD HAZELWOOD - CBS NEWS At looking at the picture this
morning, it seems as though to latch the SIR-B — seems like a
very manual kind of thing that you just sit in it and it would
close. Would one of the options be either an EVA or have a don
journey the EVA or using the Canada arm to put it back in place.

LACEFIELD Both those options are viable options. They are
being looked at by the flight control team. They are looking at
pressing down on the antenna with the arm, and they do have an
option that they have evaluated with an EVA to strap the antenna
closed, but we are not talking you know, once its closed, its
closed

PAO Okay, we will take one more question here in Houston

and then we will go to the other centers and come on back for
your remainding questions. Carlos Byars

BYARS Let me expand on that question a little bit. If

you used the arm or if you used an EVA to mash that SIR-B antenna
down and get it latched, would it be possisble then tomake your

STS 41-G CHANGE-OF-SHIFT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 11

own maneuver, unlatch it, collect some more data, and then either
do it over again with the arm or use your pyros to finally shut
it off. And if that is not considered feasible, where are you at
as far as shortening the length of this mission because your maps
is well along, the file is well along, the only thing that you've
got the the other driver, as I understand it, for the i eng th of
the mission is the large format camera.

LACEFIELD That is feasible. Your first question is, you know
it is feasible to do that.

BYARS Is it being — I assume that if it's feasible, its

being considered. But is this 17th item down the row or is it
something that you're looking at number 1, 2, or 3.

LACEFIELD We are looking at the first OP. We haven't given up
on being able to stow the arm with the way it is suppose to be
stowed and we are looking at the thermal effects to see if we
can't get it to stow on its own. The second thing the team is
working is looking at using the arm. The last option -- well
the last two options that we would be looking at would be the EVA
or when we are doing the EVA to tie the arm or the leaves closed
or the direct stow that Doctor Tilford talked about. So we will
know the feasibility on the first two options here in the next
day or so probably, and the team is working on both the prime two
options on this shift.

PAO Okay, now we will go to and take questions from

Kennedy Space Center, Florida and then we will come back here to
get some

JAMES PITCHER - THE ORLANDO SENTEL For Doctor Tilford, you
mentioned that you were going to try to get information back to
each of the principle investigators if you didn't get the problem
with the antenna fixed. Are you talking about all 44
investigators or just those in the ten main areas you wanted to
get .

TILFORD We are talking about all the principle

investigators. We are drafting a status report at this time
which we will send out later today.

PITCHER All 44

TILFORD That's correct.

PITCHER Okay, thank you, that's all

BILL BROAD - NEW YORK TIMES Mr Lacefield is there anything
you can do other than the OMS burns to bring the ship down to the
orbit you that want in case you can't get the thing latched up?

STS 41-G CHANGE-OF-SHIFT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 12

LACEFIELD We do have enough gas that we could make an RCS burn
to bring us down. At this time the team is evaluating the
effects of an RCS burn on the antenna and that is being worked
right now.

BILL HINES - Chicago Sun Times I may be a little bit

confused, but if you have three options for stowing this antenna
or latching it, the Canada arm, using an astronaut to put straps
around it, or firing pyrotechniques , and all of these are all
irreversible, then why would you even consider putting an
astronaut at risk. Why not use one of the others where a person
is not a not at risk by going out into EVA.

LACEFIELD First off, closing the antenna with the arm is not
ruled out as being irreversible. Putting the — once we do the
direct stow, that is irreversible, and once we have done that the
antenna would remain close. As far as the EVA option, the EVA
option needs to be looked at. There are two bosses with a hole
on them at the end of the panels that we are looking at that have
a hole through them that we could see if we could see if we could
tie a tether through them. And the feasible of that option is
being evaluated.

HINES Let me follow up. But that second that your just

mentioned would be an irreversible option. Put a tethering that
thing you wouldn't be able to untether it later by some remote
means, would you?

LACEFIELD That's right

HINES Then why even consider the astronaut EVA option if

you have got the pyrotechniques that you know will work.

LACEFIELD We won't. We will turn the pyrotechnique stow
before we ask a crew man to go out there and tie the leads
together .

TOM BOYLES - TIPTON CONSERVATIVE You have had two latch
problems, one was deploying the solar cells on ERBS. If ERBS
had to be put back in the cargo bay, if the solar panels hadn't
deployed, would that have been a hazard to EVA or is the SIR-B
antenna a hazard to EVA because those things are not latched.

LACEFIELD In the first case, with one antenna deployed we
would probably not have considered putting ERBS back in the
bay. As far as the second part of the question, if the SIR-B
antenna is folded, it's no hazard to the EVA, in fact, there are
elements to the EVA have been planned with the SIR antenna
unfolded. So I don't think either of those would be considered a
hazard to an EVA in itself.

STS 41-G CHANGE-OF-SHI FT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 13

BILL BROAD - NEW YORK TIMES I don't understand what trade offs
are between the RCS and the OMS burns. Why not just go for the
RCS instead of some of these other options and not worry about
restowing it right away.

LACEFIELD The problem with the RCS is that it burns
approximately 20 percent more than an OMS burn. So the cost of
doing the maneuvers is quite a bit greater. At the time I left
the control center, the SIR-B people were still evaluating
whether they wanted to take the loads of the RCS jets, and they
are still evaluating that at this time. And so we are all right
to stay where we are at right now. We got time to make the
decision, we can do the burns to bring us down by the end of the
day and if not we can delay it till later. We don't have to rush
into a decision.

TOM BOYLE I phrased the question poorly. The two solar
panels that fold out, if they had not folded out and you had put
them back put ERBS back in, would that have been a hazard to the
EVA like the panels inadvertently folding out.

LACEFIELD Yeah, the way we did it, we deployed the -Y array
first. That was our plan. If that deployed, then we had a
mission. We actually can operate with the other array not
deployed and with the ESSA not deployed. Once the -Y deployed we
had to be let go. We were going. But, if when we tried to
deploy the -Y, and we couldn't get it to deploy, we have a
mission rule where later on there would have been an EVA or they
would have strapped the -Y solar array with a strap across the
deck with a +Y solar array and then they would have restowed us
and we would have landed to fly another time.

MICHAEL WATSON - ROYAL ASTRONAUT ICAL SOCIETY OF CANADA It
seems that a good deal of crew time is being taken with the SIR-
B problem, is that having any problem on the Canex experiments
either in terms of delaying them or making unavailable other crew
to assist Marc Garneau in those experiments. Especially the
sentry experiments that require other crew participation?

LACEFIELD The orbiter glow experiments this morning were
conducted on time and the Ku- band antenna testing did not
interfer with that

KENNEDY That's all the questions from Kennedy.

PAO Okay, thank you. Back here in Houston while waiting

for the next question, right back here, Dana, the gray jacket,
let me give you an advisory and update from the control center.
What they are thinking about doing now with the SIR-B antennas is
to cycle the outer leaf to unstow the outer leaf and then stow it

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STS 41-G CHANGE-OF-SHIFT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 15

encouraged to make a statement about his experience in space and
not just about the work he has accomplished during the day.

LACEFIELD That's something that we can definitely put up in
message tomorrow and discuss with him. We did on one of our
passes this afternoon, we did look, I don't know if you were able
to see it, when we came over Hawaii, we were able to see parts of
Canada. And although he was quiet, we were looking at Canada by
his request. Sally says how would you guys like to look at
Canada. We got one interested party onboard. And we said
certainly.

PAO Mike Mechum, again, please

MECHUM Not to play Monday morning quarterback to badly, but

can you explain to us why you use electronic latches for this
SIR-B instead of — you got an arm there that works like an arm
of a human — is there consideration of doing something like this
mechanically so that you can unlatch things mechanically and not
have to go through these kinds of gyrations.

LACEFIELD Well, as you probably know, several micro switches,
we have now done just what you described. These particular micro
switches are essential to prevent human failure and overrides
such to make sure that we don't unfold one antenna panel into the
second one. In retrospect, yes, and I'm sure when we fly this
antenna again, we will make sure we do have overrides in order to
be able this does not happen again

PAO We'll just have to take two more questions, Carlos

and this gentleman over here. I don't mean to cut is short. If
you have any lingering questions, I want you to come forward and
we will conduct those in a less formal basis. Carlos Byars of
the Chronicle.

BYARS Mr. Tilford, would you explain to us a bit more

about this problem. If we have an EVA or during an EVA, the
astronauts close this panel down, would it be necessary for them
to, in fact, lash it in place or is there the options that they
mash down on it, sit on it, stomp it or whatever to get it to
latch with you electronic latches so that it can be subsequently
reopened and reused. This point to me is still unclear.

TILFORD We are looking at a number of options right now.

The problem with the currently scheduled EVA open would be late
in the mission, and therefore there would be very little time
left if we took that option. Therefore, I think what we are
really looking at right now is the first possibility that Cleon
described earlier. And that is using the arm to push it down.
We think we can achieve probably with the arm that we could with

STS 41-G CHANGE-OF-SHIFT BRIEFING p3j 10/6/84 11:35 a.m. PAGE 16

the EVA in this particular respect. The latch down capability/
actually tying the antenna together is something that again is
irreversible in a sense.

BYARS Yes, I understand that

TIL FORD But, no, we are looking at the arm as the first

option.

PAO Okay, finally

JACK HOWARD - CBS NEWS Doctor Brittoner, you said if you
can't get the Ku-band antenna to work you are going to lose 80 to
90 percent of the capacity of this SIR-B to really capture the
data that you want. What are the areas that you will concentrate
on and what are some of the areas you might miss.

BRITTONER We will identify those for you later on. As I say
we have identified 10 primary areas, most of which we are looking
at for multiple coverage. And we have tried to pick those most
important objectives for the mission and that does include, as I
said, oceans, land, deserts, vegetation. And in some cases we
have two or three examples of these in different parts of the
world. Depending on the outcome in the next 24 hours we will
define those areas for you

PAO Okay, I guess that does it. If anybody has any

other questions, come on up here and do it. Thank you for your
time and attention.

END OF TAPE

STS 41-G CHANGE-OF-SHIFT BRIEFING p4j 10/6/84 08:00 p.m. PAGE 1

PA0 Good evening, we're here with off-going Flight

Director John Cox, change-of -shift press conference - we re orbit
two on flight day two. John, why don't you give a summary and
we'll go into questions.

rox okay, today we did the burn, the series of OMS

burns to bring us down to an intermediate altitude. I believe
we're at about 137 miles now, circular, and will transition
tomorrow into the 121 1/2. We did have some trouble, we ended up
delaying the OMS burn. We had an anomaly show up on the SIR B
antenna stow, got out the old favorite tool that we've found,
cSme ?o know and love, so well over the last several flights, go
to the RMS and give it a little tap, push down to make
microswitches work on it and got the latches to drive shut .
That's a requirement to have that antenna stowed for OMS burns
and it took us an orbit or two to get that task completed but
that all went pretty well. So, the antenna is currently stowed
and we'll open it up again tomorrow morning after we finish the
circularization at 121 miles. Large format camera continued to
take data today, looked like they had a pretty successful day.
We had the crew pull a bunch of the middeck apart and worked an
IFM on the Ku-band antenna. We now have a Ku-band antenna
pointed in a starboard direction and it seems to be in a fixed
position and we're able to transmit and radiate with it.
Tomorrow morning, after we finish the series of OMS burns, we
have a procedure onboard already to have the crew try to position
thai antenna, position the Orbiter, such that that antenna will
point at the TDRS satellite. If that works, we feel that we'll
be able to transmit data in a dump fashion off the high data rate
recorder for the SIR-B people and begin to pick upon the SIR-B
data collection timeline a little more seriously than we have
been able to so far. I think other than that that pretty much
hits the highlights of the day. We did receive Mark Garneau's
report, looked like he accomplished most of the activities he had
planned for today and we also passed some information up
concerninq the ERBS, it's had a very successful flight so far. I
th?nk yoC had a briefing earlier today on how well ERBS is doing
and we were able to pass some of that information on the the
crew. I'll take questions, thank you.

PA0 Here up front because he's got a deadline, Carlos

Byars .

BYARS How did this rework of the cable go? Was he able

to unplug this, do you cut the wire or what? I understand that
Crippen came up with a real neat touch on getting it to stop

STS 41-G CHANGE-OF-SHIFT BRIEFING p4j 10/6/84 08:00 p.m. PAGE 2

right where you wanted it to stop and I'm curious as to just how
he managed to do that.

COX Well, that's was probably by slight of hand. That

was all done LOS so we didn't get to watch him do i t . We left
the system up fully powered. We didn't get into the IFM or
anything for moving the antenna. We have identified the motion,
there's two gimbal angles on that antenna, one we call the beta
gimbal and one we call the alpha gimbal. And depending on how you
point it, you can look at it as with an elevation-type of drives,
but we drive in so many different directions, it's hard to really
identify that. But, the beta gimbal is stuck hard over at its
hard stop point and I think that's about 86 degrees off of its
centerpoint. The alpha gimbal then, because you're clear over at
that hard point, it has a singularity in its drive capability and
that's why it continues to hunt and flop all around. But, when
you look at the antenna the way its pointed out, when you fix the
beta like that, then that pretty much says that that antenna is
going to be pointing in the same direction plus over minus those
four degrees that you don't get because you're not pointing at
90. So, we knew that it was just a matter of, you could turn
power on and turn it off, and turn it on, and turn it off, and
pretty soon you get the alpha gimbal to stop some place that you
liked. So, we gave them a visual description of about where we
would like it. It's about 45 degrees from straight overhead, so
that when we go to do a stow maneuver, that antenna will all move
inboard and not hit the longeron or anything like that, toward
the end of the flight when we need to do that. So, just by luck,
he hit it within .87 degrees. We couldn't believe that he did
that because he doesn't even have any data onboard to do that.
He had to just totally eyeball it, but it worked very well and
that's where it is right now. Now, the IFM that we did was a
separate whole subject. That was pulling a bunch of lockers
apart down in the middeck and what we did was went in and
disconnected the drive signals to the gimbals. So, now they're
where we want them and we have no more drive capabilities. So,
now when we bring power up, the gimbals don't go anywhere.

BYARS So, now you simply maneuver the Orbiter, say

simply, that's no 1 ; going to be very simple. What, he's going to
have to keep this pointed within a degree and a half, I believe,
and, does he have anything more than a lock on, go no/go light up
there to indicate a lock on TDRS?

COX Well, to show you how much fun this is, he doesn't

have anything onboard to tell him he's there, because that's not
a two-way signal. All we are is transmitting out from the

STS 41-G CHANGE-OF-SHIFT BRIEFING p4j 10/6/84 08:00 p.m. PAGE 3

Orbiter. If you recall, the return link, the forward link
doesn't work on that, on che satellite. So, we'll be watching
from the ground and we have a search pattern set up with a series
of small maneuvers and we gave the crew a whole page of these
maneuvers that are possible. There's probably 30 some
maneuvers. We would probably use six, seven, to eight of them,
depending on where we think the gimbal is after we finish the OMS
burn, because now with no drive power on those, on that antenna,
it's possible it's going to wobble off a little bit. So, we'll
have to do an evaluation after the OMS burns tomorrow to see if
we think it's moved. And we have telemetry data to tell us where
we think it is. And, based upon where we think it is, then we'll
give him the maneuvers that correspond the hunt that would find
the satellite. We'll watch the data on the ground and when we
see the signals starting to pick up we'll know about the angles
to go to and then we'll maneuver to that. We'll start him off at
that point to start with where we think it is.

BYARS (garble) try to talk him in.

COX Watch him go through the maneuvers and say, "Ah ha,

we see some signal strength there," logged with those gimbal
angles are at that point and then have him go back to those
angles and see if we acquire.

BYARS Thank you, John.

PAO This gentleman right here. Please give your name

and affiliation.

GREENWALT Frank Greenwalt from the Daily News in Los
Angeles. Who actually moved the cabinets around?

COX I think he said Kathy was doing that. I think Crip

got involved because he was down there describing how difficult
the job was looking. I would suspect two or three of them
probably were involved in that.

GREENWALT And also there was some mention today of delaying
the EVA one or two days.

STS 41-G CHANGE-OF-SHIFT BRIEFING p4j 10/6/84 08:00 p.m. PAGE 4

ray The reason we're talking about that is, SIR-B is

the one that's short on the data takes. One of the potentials
that we may want to do. We've got two things that aren't working
weU tLt ave out in that cargo bay, one is that Ku-band antenna,
the other is the SIR-B stow capability. So, and I might also
advise you that there's an interface problem, those two antennas
Play with each other in the geometric envelopes that they operate
in? so if you have your SIR-B antenna out and you have your Ku-
band an enna stowed, you can't stow the SIR-B antenna, they hit
each other. So, if we decide that we would like to have the Ku-
Cand antenna tied down in some manner, that's one of things we're
looking ^? so that we can prevent damage during entry., then we
ma? ask the EVA crew to do that. Well, once we've done that,
we've lost that Ku-band link again. So, one of the
considerations that's going on right now is maybe extending. The
thing,the forces that are keeping you the other way, is we still
have that OMS pod potential and that's saying well, there s no
ooint in extending much. That would be a flight duration
extension? We're 9 not really considering that, but if you had no
other reason to stay up, you might come down earlier, if you
weren't getting, if you weren't doing any good for SIR-B. Now,
SIR-B is off working to see that if all this work that we're
doing s going to buy them very much. Off the top of your head
you would think it would probably buy them at least half their
data takes back, if not more and they're off evaluating that. We
have no idea That their numbers are, what their impacts would be,
maybe 50 percent, 25 percent, or more , I don • t kn <™ . ^. s

qoing to be. But, they're looking at that. So, we 11 first
tomorrow find out whether this trick is going to work and whether
we can acquire it, and whether or not we're making any money and
then aftef we decide whether or not that's working alright, then
we'll step back, or if it's not working, we'll evaluate how well
it's not working and evaluate whether it's worth staying up to
continue pushing in this direction or does it make no sense at
a??, just allow the other experiments to expend their consumables
and then come on in.

GREENWALT Does it follow that with delaying the EVA would
also delay the landing?

coy No, not at all. The day we were just

hypothetical^ looking at, was maybe flight day seven, ha would
give you eight for stowing the vehicle and still land on flight
nine .

GREENWALT

And one other question, I thought that I heard

STS 41-G CHANGE-OF-SHI FT BRIEFING p4j 10/6/84 08:00 p.m. PAGE 5

that they were thinking they may use the EVA to secure the SIR-B
radar antenna. Did I hear that correctly?

COX If you recall, if we decide that we have to stow

the Ku, then we would have to have the SIR-B folded first. Okay,
now you don't have to EVA-stow it, that just means that we would
probably stow it EVA day, if that's the case. Could probably be
done from inside the cabin before we went out.

MOLINA Dan Molina from NBC. At first I was really

surprised to hear you say that you were going to unstow the SIR-B
antenna again with all of the trouble that you had locking it
down, but I guess in listening to you, that it's really important
to this whole success of the mission to have that back out again.

COX The SIR-B experiment is a very high priority

experiment on the flight.

MOLINA The hinge was tough though. Aren't you afraid that

that might happen again? You've got to be afraid that...

COX Well, we went back up to, there's, they knew that

with all this mechanism, they wanted to build in a bunch of
redundancies, so they have a lot of different ways to stow that
antenna. We have an electronics box, an electronics box B, we
have a pyro system that is almost totally redundant, which what
the pyro system does is release those springs that just
automatically drive everything closed. And then in addition to
that we have an EVA way, that with the crew is already trained to
do in the water tank, to go ahead and stow it, also. So, given
all those different...

MOLINA To Stow the SIR-B?

COX ...to stow the SIR-B antenna. So, given all that

range of different ways to stow it, what we probably have lost at
the moment, unless we can, and they're already looking at a
troubleshooting procedure to look at that maybe tomorrow or the
next day, on seeing if they can't get that latch mechanism and
the microswitches to mate, doing some other tricks. We still
have quite a few ways to stow it, so the risk is not necessarily
very high to let it stay out and keep it operating for awhile.
And we know that if, as long as we got the EVA

STS 41-G CHANGE-OF-SHIFT BRIEFING p4j 10/6/84 08:00 p.m. PAGE 6

day out in front of us, we can, if all else fails, we can tie it
all down that day and be done with it.

MOLINA You mentioned pyro technics,

thinking that that's jettisoning?

Am I right in

cox no. No. All they have is some little pin P"ll ers '

Shen you fire these, burn these little wires, there s actually a
Tittle wire that burns and allows the spring force to pull a pm
out and we have some prewound springs on that array and you can
?ake every one of the moving mechanisms. You know you have the
two leaves, you can take each one of them separately, you can
eUher drive^hem electrically with different motors or you can
null the pin out and the spring will just flap the thing
cfoled li's just a one-time-only thing, it'll go closed, and
voS Dull the other one and it'll go closed. The same thing
worked with the latches. They have an electrically driven latch
that's driven by two different motors and that's the ones we're
wooing wUh today. And we could not get the array down low
enough to trip the microswitches that allow the latch motor to
drivS? they have an interlock with the microswitches on that.
The trick was to keep pushing it down until that would go, but
you Hm always have blown the pyro thing and it would've
qone. It doesn't need those microswitches to let ^ go. so, we
Tone riqht in and latched. And we asked the crew today on the
l??-to-grounS whether they thought it was down Ear enough that
the pyro latch would've made and they thought it was.

MEDIA
antenna .
entry?

COX

I'm qetting a little confused about the Ku
Does it, or does it not have to be stowed before re-

Oh, it has to be stowed before re-entry.

MEDIA Okay, does that mean you're going to have to hook

it up again to bring it in? To make it rotate?

COX Okty, that's part of a story that we're working on

oretty hard right now trying to understand the Ku-band. Th s is
the longeron here. Currently, if the antenna is out doing its
work and it's pointing straight out in the starboard direction.
When vou stow it, it'll come on in, but with that beta gimbal
SuckHhl antenna will be stuck in a Position like this. Now,
if the beta gimbal drive is not hard stuck, like if there s not
some real mechanical hangup out there, that antenna will move.

STS 41-G CHANGE-OF-SHIFT BRIEFING p4j 10/6/84 08:00 p.m. PAGE 7

You could just, if you take a real one here and bring if in this
room, you could just blow in it and it'll move, it moves that
easily. Okay, so if the door would come in, as it closed it
would just fold it in and it would be inboard. So, there's no
big problem with that. Now, that thing will wrap against the
door probably during entry, because again there's nothing holding
it. People have looked at that and ever since we've been flying
this antenna, we've been faced with the potential that that may
happen someday to you. And the analysis has shown that that
graphite epoxy antenna may break, the dish part, but all of the
electronics and everything else will come through all right and
we'll just have some broken graphite epoxy pieces in the cargo
bay when we land. So, that's the overall assessment. I don't
feel it will do any damage to the radiators. That's where we are
right now. Now, that we really are faced with this problem,
everybody's looking at that harder and seeing, well, was that all
proper. So, we'll get some more feedback on that.

MEDIA On the repairs in the cabinet, trying to get some

spacial relationships here. Whoever went in there and unplugged
the plug, did they actually have to crawl into a cabinet or is it
just an arm's reach in or wrist reach in or what? What are we
talking about?

COX Okay, you know how they. ..you go to the middeck, if

you're familiar with the layout on the middeck, the forward side
is just covered with lockers. The backside, the back starboard
side, is lockers, the back port side is where the waste
management system and all that is. Okay, to get you oriented,
now back over on the starboard side, that's all lockers, they
probably had to pull out the top two or three rows of lockers
plus there's a large stowage volume area over on the side that
isn't a locker, that they had to pull that whole thing out.
That's probably four or five locker rows tall and about a half a
locker row curved shape deep or in width and then they had to,
it's the depth of the whole set of lockers. They had to pull
that out plus all the lockers overhead, so they could get at the
close-out plates that separate the locker world from the avionics
world behind there. And there are some large plates they had to
unbolt to pull those things out and that gave them finally access
to the shelf. Once that was done, all they had to do was reach
in and undo a connector, but you had cleared out a volume that's
maybe half the size of a desk or something like that, of
lockers. So, that you could get this large close-out panel
removed to give you access to the shelves.

STS 41-G CHANGE-OF-SHIFT BRIEFING p4j 10/6/84 8:00 p.m. PAGE 8

MEDIA Crip said that Kathy and Sally were working it.

Are we to imply from this that they did most of the work? Sally
gave a report on it later.

COX Yeh, they probably did. I know Lhat each of the

crews get different assignments to work on things, an IFM or
inflight maintenance is one of the assignments that people get.
Crip has had that in the past. Sally has had that in the past.
Kathy has it this flight and there's one other crewman that has
it this flight. I can't remember which one has that. But, those
are the ones you would expect to be doing the IFM work, people
that are familiar where all the little attachments are and what
tools you use to do what. They go through a regular training
program on that. So, it makes sense that at lear,t Kathy and
Sally would be involved. Crip would probably be involved with it
and there's somebody else and I can find out who that is if
you're curious and whose trained to do those kird of jobs.

MEDIA An editor from afar has asked for, has asked me to

ask you for an explanation of some jokes that were aboard. One
doing with the temperature of the radishes, I assume that
referred to the seeds that are onboard?

COX Right.

MEDIA Okay, and the Fabian tool?

COX The Fabian tool is a hammer.

MEDIA And why is it called that?

COX I don't know. You have to ask John Fabian.

There's some of us folks around who fix things with a hammer a
lot of times. Maybe that's related to that. The radishes, we're
growing radishes in one of the canisters and one of the things we
do. That canister also has with it a transmitter that can be
received on the ground and when you set one of the relays in that
canister, the canister is going to broadcast some data related to
that canister and one of the things it's going to broadcast is
the temperature of the canister and people have thought that's
kind of funny that as you're in your ship at sea, you can clearly
hear the temperature of the radishes in orbit.

STS 41-G CHANGE-OF-SHIFT BRIEFING p4j 10/6/84 8:00 p.m. PAGE 9

MEDIA And then there was several jokes made yesterday

about they, releasing the satellite over Kansas.

cox That's where, I believe that's where Steve Hawley

is from, and that's Sally's husband, and they were married up in
Kansas .

PAO Okay, we'll take about two more here. Craig, you

'had your hand before just about anybody.

MEDIA Yeh, Paul cleared most of them. I just wanted to

make sure, I understood why you felt you had to go in and pull
the switch on the, and I was flying over when a lot of this was
underway .

COX Why we had to do what?

MEDIA Why you had to go pull the electric circuits on the

antenna .

COX There's some great TV that shows every time you turn

this thing on what it does.

MEDIA It was actually continually swaying on you,

correct?

COX Right, the fact that the beta is already locked

over to its hard place, the singularity in the alpha control just
drives you nuts, it just randomly wants to hunt all over the
place and it's just driving very wildly in those directions.

MEDIA I guess a better way to state the question actually

is do you think you understand the failure itself and what is the
type failure you're facing.

COX No, no, you could have electrical hard stop. The

motor on the gimbal could be driving all the way over and holding
it, you could have a mechanical jam over there holding it, there
could be something wrong in the logic that's causing you to stick

a motor command on when you don't really want to STS 41-G STS
41-G CHANGE-OF-SHIFT BRIEFING p4j 10/6/84 08:00 p.m. PAGE 10

have it on. They're going through all those different scenarios
and so there's still a lot of work that people are doing right
now to see if there is a way you could drive that to the right
positions. That's why the EVA is just one of the things. If
somebody gets a real bright idea and there's several of them
around floating, you just can't eliminate them all yet, there may
be some we.y yet to still drive that antenna, not automatically,
but maybe some manual method to drive it to a fixed position.
One of the things we're looking at is you could take the alpha
commands which seem to be working and crosswire them into the
beta and set the alpha command that you want and then let it
drive the beta gimbal, but you don't know what the failure is yet
and they're trying to evaluate whether or not that would do any
good .

MEDIA Okay.

PAO We'll take one more question here, go to KSC, then

return, the gentleman in the tweed coat.

MEDIA We heard about the activities of Crippen, Sally

Ride, and Mark Garneau today, but what about the other four?

COX Oh, I think we've heard, Scully, I haven't heard,

Scully-Power I haven't heard anything from him yet. But, we
weren't expecting to any reports from him during the flight.
Let's see, I've heard John's voice on the air-to-ground several
times. I think he did the CMS burns or whatnot, so, we've heard
plentyu from him.

MEDIA Leetsma.

COX Leetsma. He's talked plenty. He did the ORS

transfer .

PAO Okay, we'll go to Kennedy Space Center and we'll

get your questions when we come back.

MEDIA I wonder if you could detail of why Commander

Garneau's experiment, one of them was only a partial, I think he
reported, he hadn't gotten through all of it, and also am I right
in assuming that tomorrow that we might hear his thoughts on

space, like might he speak to us in non-technical terms.

STS 41-G CHANGE-OF-SHI FT BRIEFING p4j 10/6/84 08:00 p.m. PAGE 11
COX Did you get very much of that?

PAO The question was were Garneau's experiments only

partially completed today and I think he had said inthe evening
status that they were, some were full and some weren't.

cox I didn't bring that not over with me. I copied

down all the items he reported and they went back and looked at
what he had scheduled. My interpretation there was he probably
had at least 90 percent of what he was scheduled to do. OGLOW
was most of the activity he had and most of what he reported was
OGLOW. There might have been one (garble) and that's kind of
pictures of opportunity, maybe he didn't have the opportunity, I
don't know, he didn't explain any reason why he didn't accomplish
everything, but it appeared that the big items that he had on hxs
flight plan for the day were covered.

MEDIA And the second part of the question, might he speak

tomorrow, to Canadian, or relay to the Canadian reporters
thoughts on space. I think this was asked earlier today at 11:45
at the last briefing, whether he might be prodded into saying
something .

COX I suspect anytime he wants to say something, we'll

be happy to hear it. The norma] way that the crew is operating
this flight is that he's going to have a piece of the evening
status to tell us anything he wants to about how things have
gone. I don't think he's expecting to talk during the day. IE
he does, we're more than happy to listen to it, we're not
intentionally trying to prod it. The problem we've had so far is
we've been working all these anomalies related to getting the
ERBS deployed yesterday and getting the SIR-B antenna and the
orbit adjust burns done today and there really hasn't been a nice
clean opportunity to just say, "And oh by the way, while we're in
the midst of tearing up the middeck, would you like to have a few
words to say."

MEDIA Is Mr. Garneau playing any role at all in assisting

as you attempt to solve some of problems with the Ku, etc.

COX I would assume that, and we talked about that IFM

that went on and all the different things that were pulled

STS 41-G CHANGE-OF-SHIFT BRIEFING p4 j 10/6/84 08:00 p.m. PAGE 12

apart. If you look at the list of tools involved and all the
lockers that were out, I would imagine that was a lot of hands
helping a lot of people hold things down, restrain them, and
keepinq that middeck somewhat under control during that whole
operation. It would be hard to believe that almost everybody
didn't get a hand in that. However, if you notice most of Mark s
activities are pretty much things that he does by himself or with
the assistance of the other payload specialist onboard. So, in
general he's pretty tied up and pretty busy with his CAP if
you've read through his CAP, it's a, it keeps him pretty busy and
hopping. So, I would expect that he may be looking more for help
from the other crewmen as opposed to him helping them out, but
I'm sure he does anytime he gets a chance.

PA0 And as we come back to JSC from KSC, I might add

that tomorrow's TV plan, originally at any rate, calls for some
middeck television where we might see payload specialist
Garneau. Do we have any more questions here? Let's take one in
the back and we'll come back up here.

MEDIA With all the lockers and paraphernalia that's being

pulled out, has that created any problems in sleeping
accommodation? You already have a full crew, you've got all this
stuff strewn around. Have there been any adjustments to be made
and how does the crew find the sleeping quarters? Is it crowded
to the point where it's a little uncomfortable to get to sleep?

cox to kind of a quickly do that one. Crippen was very

haopv. He was somewhat concerned that we pull all of that out
but it all went back, he said so, if we got all the lockers back
and all that closed out again, so they were pretty pleased that
that went. I haven't heard a thing about sleeping.

PA0 Further questions? Right here on the middle row

there. Could you give your name and affiliation.

HAZEL Harold Hazel, with CBS News. Could you tell us

when you're likely to know whether or not the mission wiU be
truncated, shortened?

COX I think what probably if you were trying to figure

out logically the way you do this, I think we'll look and see ho
well this Ku-band antenna pointing at the satellite works
tomorrow. And then to try to take data in that mode.

STS 41-G CHANGE-OF-SHIFT BRIEFING p4j 10/6/84 08:00 p.m. PAGE 13

We'll let the SIR-B folks put data on a recorder then
periodically maneuver the Orbiter so that we can point the
antenna up and dump. There's quite a bit of concern that the
antenna 's P go?ng tomove and wobble a little bit and it won t be a
piece of cake just to maneuver to Orbiter back over and get this
nice line of sight. And if it turns out to be a great deal of
difficulty, where you spend half your TDRS pass or maybe the
whole thing just hinting to finally get the satellite, everybody
is qoing to quickly conclude that this is not working. However,
if it works real well and SIR-B is able to recupe a great deal of
data, I think we'll probably press on and continue, but it s
going to be an evaluation of how all of this works.

MEDIA

And you'll know that roughly when?

cox Well, we're going to make the first attempt after

the OMS burns tomorrow, oh it probably is an hour or two before
the crew's mealtime, so we're going to have to get a CAP out and
translate that down...

PAO

I think that's right in rev 34 or 35.

COX Okay, in that ballpark. That'll be the first

attempt. That doesn't mean that we would give up if we had
trouble on that first attempt but we'll have a rough idea of
whether or not we're in the ballpark of working.

PAO

Further questions. Up here, Paul Recer.

RECER To help the Canadians along,

that spotted the aurora today?

Wasn't it Garneau

cox That's right and he did come up on the air-to-

ground come to think of it, he reported that.

PA0 And I'm also told that rev 35 is in works on the

planning shift for middeck television for tomorrow morning where
it is likely but not assured that we'd see Mark Garneau. Any
more questions? Oh, one more, no right behind you Bart, I ra
sor ry .

MEDIA

Is the removal of the insulation, the OMS pod,

STS 41-G CHANGE-OF-SHIFT 3RIEFING p4j 10/6/84 08;00 p.m. PAGE 14
likely to create any problems at all on re-entry?

cox i think I went over a lot of that yesterday, but

the concern that we have right now is no factor, no safety factor
related. What may happen on there, we may see a little bit of
delamination in the graphite epoxy layer on the OMS pod, by the
time we land. So, that's the concern tnat most Pjopjehave s
how much of that are we going to get and what's the repair time
going to be for that.

PA0 And John, one last thing I'm supposed to ask for a

friend, Carlos Byars, how large format camera did today?

cox it did fine. I don't know if they got absolutely

100 percent of what they started out to get because we ended up
delaying OMS burns. We may have cost them a target somewhere,
can't tell, but they're working fine.

PAO

They had one or two data takes, didn't they?:

cox They had six, seven, or eight, something like that,

somewhere in that ballpark.

PAO Thanks for coming out tonight.

END OF TAPE

STS 41-G CHANGE-OF-SHIFT BRIEFING p5j 10/7/84 12:00 noon PAGE 1

PAO Good day, everybody and welcome back. Here to

debrief his shift is flight director, Cleon Lacefield.

LACEFIELD Good afternoon, we have had a very interesting shift
this morning. We have been able to point the Ku-band antenna at
TDRS, and, as of the end of the last pass, we now have dumped the
high data rate recorder two times. We are going to dump the high
data rate recorder three more times today. So we are back in
business with the SIR-8. We are back taking data and doing the
high data rate dumps. It took approximately 30 minutes to get
the orbiter pointed right this morning. We had the two OMS
burns. And yesterday Crippen moved the Ku antenna to about the
45 degree position off to the side. During the OMS burn, what
happened is the antenna slide down another 14 degrees. And we
recalculated the vector from the antenna to the TDRS. And that
took us about 10 minutes. And then once we had the vector
calculations, we fed that up to the crew and we were able to
point at the TDRS antenna and we got a very good dump. SIR-B was
unstowed. We had planned to do a test this morning where \>e were
going to latch and unlatch the outer leaf and look at the inner
leaf; but when we got to where we would do the test, we were
running a little bit behind and SIR-B had a high priority data
tape that they wanted us to go ahead and deploy the antenna so we
could do the data tape, which we were able to do. And when we
did unstow the SIR-B, we did not get... the antenna did not lift
off... it was not preloaded like we had seen a couple of days
ago, which made us feel very good. All the micro switches were
working when we unlatched. The antenna stayed there. We were
able to deploy the antenna without any problems so we have
cancelled that test for the time being. It might be... we are
evaluating whether we even want to do the test later on in the
flight. But the antenna is looking very, very good. We had one
slight problem last rev with the antenna. It's in the tilt axis,
and what we do is the antenna tilts all the way to 60 degrees and
the micro switches is suppose to lock when we get to the 60
degrees to prevent it from tilting any further into the hard stop
failed. That is not a problem. All we do is point the antenna
at a little less than that. The hard stop is at 61 degrees so we
can go all the way to 60 degrees and not have a problem. So that
is not an impact. The OMS burns that we did this morning took us
down to a circular orbit of 121 by 121. We are evaluating a trim
burn this aftnoon. Whether we want to do an RCS trim burn to
bring us within a half mile of where we need to be on the cert.
You probably saw the cabin TV at Hawaii. Everyone was doing
fine. We tried to get Marc to talk with us. He was in the
middle of one of his experiments. And you probably saw him, he
was pointing at the little cross on the cabin there and Scully
Power was busily copying down all the information. The rest of
the experiments on board are doing extremely well. We are
getting all the data takes that they need. SIR-B will be
catching up. And I believe we talked about once we got back and
pointing at TDRS, what that would mean and those numbers are

STS 41-G CHANGE-OF-SHIFT BRIEFING p5j 10/7/84 12:00 noon PAGE 2

approximately the same as Doctor Tilford told you guys
vesterdav. Right as we were going off shift, we had a proDiem
5iS the y flash 9 eva P orator system. You probably noticed that.
And it looks like we might have some ice m the flash evap which
iust means we are just going to have go back to doing a water
lull And if we .. we may have to schedule a water dump this
afternoon. The team on console now is evaluating when we can get
the FES back up and operating. And that's about all I have

PA0 okay, questions here in Houston first. John Gedder

JOHN GEDDER Does this developments with SIR-B, do they eliminate
the possibility of having to shorten the flight.

LACEFIELD What we are looking at right now with the f light, is
possible doing the EVA on flight day seven This would axlow us
to take SIR-B data takes all the way up into the EVA. And the
Reason we are saying that is because where the Ku-band antenna is
riaht riqht now, down to the side. When we go to the stow
poStionrremember the beta gimbal is still up against this hard
Ttoo so the antenna is still sticking out into the envelope of
payload bay doors. We are looking at that time having the EVA
clew men go ahead and straighten out the antenna which could put
Z in Tpfoblem with SIR-B because SIR-B has to be folded when we
are drying to do this stow exercise with the Ku-band antenna.
And so what we would like to do is make sure we can get as much
S?R-I data as we can and then go through this exercise Then we
think that we will be okay to go ahead and calculate another
vector and still do SIR-B data. But that's the reason we are
considering moving the EVA.

GEDDER The question was, though, what about the

possibility of shortening the mission now that SIR-B is
apparently working.

LACEFIELD Ah, no, we are not discussing shortening the

ission And if we do delay the EVA to flight day 7, there
wouldn't be any way we would shortened the mission because we
will do all the packing up and getting ready the next day.

PA0 Craig Kovault from Aviation Week

KOVAULT Taking that question, I guess, one step further, any

even earliest discussion of extending a day?

LACEFIELD Right now we are not considering extending a day
either. We are talking about staying right on schedule and
coming into the Cape on Saturday.

fmvAriTT A follow-up question on the Ku-band activities this

morning. Can you k?nd ^characterize the .level of off-line work

STS 41-G CHANGE-OF-SHIFT BRIEFING p5j 10/7/84 12:00 noon PAGE 3

or overtime work, extra work, complexity of setting the orbiter
attitudes up so you were able to have such good luck.

LACEFIELD We had several positions that worked extremly hard
on coming up with the vector. The inco position, the flight
activities officer position, and what happened is they worked out
the vector. And the inco people worked out where their antenna
was pointing; and the pointers, who work for the flight
activities officer, worked up the body vector of what it would
take to put the antenna on TDRS. And so they have those programs
developed. Those are normal programs that we have to point the
vehicle, and we are using a standard track option to track TDRS
as we are coming over and doing a high data rate dump.

KO VAULT I thought during the course of the activity, that

half hour you were sweeping across and trying to find, there was
some conversation that maybe the maneuver to set up the attitude
even move the antenna little did you actually have to chase your
own movements slightly?

LACEFIELD We don't believe we were on the VRCS at the time we
were doing these maneuvers. And we are at an extremly small
deadband and extremly small rates and we don't believe that had
anything to do with moving the antenna. What happened was we had
the first OMS burn and we had 14 degrees of movement. The
second OMS burn happened when we were LOS between the time we
lost them at TDRS and till we picked them us coming around the
other side. So we had not factored that additional four degrees
that the antenna moved into our calculation. So we took
those... that four degree movement and factored that into our
calculations and then we were able to go ahead and pick them up.

KOVAULT Not to belabor it really, but simply you have

what... a one and a half degree with you can hit TDRS and the
orbiter deadband is holding at what?

LACEFIELD A tenth of degree.

KOVAULT Tenth of degree, okay, thanks.

PAO Okay, Mike Mechum, Canet

CANET You are talking in terms of possible moving the

EVA. It was my understanding that that decision was pretty well
locked in. Am I wrong on that is that still very much in the
discussion stage?

LACEFIELD It's getting to be firmer.
CANET To move it?

LACEFIELD

That's right

STS 41-G CHANGE-OF-SHIFT BRIEFING p5j 10/7/84 12:00 noon PAGE 4

CANET Firmer to move it. Okay. Which means, as a press

conference goes, which means we are basically taling about eleven
o'clock on Thursday. Essentially just moved back to the schedule
you had previously?

LACEFIELD That's right.

CANET Okay. Can you tell us, assuming that, what kind of

activity shift you would have that you were not previously doing
on Tuesday that you will now be doing on Tuesday. How does that
change .

LACEFIELD Going to be doing SIR-B data tapes.

CANET That's the basic thing you are just doing. And as

far as any of.. none of this would have any difference for, for
instance, file or maps or any of those experiments.

LACEFIELD No

CANUT Can you tell us what kind of hit LFC or any of those

might have taken because of the SIR-B situation.

LACEFIELD Ah, as of today, I don't believe that the other
experiments have taken that big of a hit because.. but they have
taken some hit, and I don't really know an answer to give you
quantity type measurement. I sure don't. They will probably be
in the morning execute package. Now that we are back on a
timeline on doing the SIR-B data tapes and the dump, we will have
an impact as far as the experiments go as far as what we are
going to accomplish.

PAO Paul Recer, Associated Press

RECER This may have happened, but I didn't hear it. Is

the delay of the EVA firm enough that the crew has been told.

LACEFIELD We have really not gone up to the crew yet. We plan
to do that here shortly.

RECER Today?

LACEFIELD We have not done that yet.

RECER Yes, but do you anticipate telling the crew today?

LACEFIELD I believe so.

RECER Okay, this afternoon sometime?

LACEFIELD We will have to see what John is going to do this
afternoon .

STS 41-G CHANGE-OF-SHIFT BRIEFING P 5j 10/7/84 12:00 noon PAGE 5
PAO Frank Seltzer from CNN

SELTZER The question about the Ku-band, is that a definite

?hat they are going to have to do that by hand to move that or
still might have some control.

LACEFIELD No, we have some other options, and I believe John
Cox talked a few of those last night. We can... we have an IFM
where we can go back in there and drive the antenna with switch
the Power from the alpha to the beta and try to drive that
lay. And we are still evaluating that before we would have the
crew do that.

QELTZER And then going back to Paul's question. We are

hoping without maybe hours the crew will be told and we will have
a firm decision about the delay on the EVA

LACEFIELD Yes.

PA 0 Jerry Hanifin from Time

HANI FIN I'm Jerry Hanifin from Time Magazine. Cleon, in

order to explain to olv readers and the viewers would you help us
Vdt an anaLgy. Is pointing . the orbiter/antenna toward the
^at-Pllite to establish communications, little like trying to
shooJ an instrument landing without needles and everything coming
from ground instruction from GPC in effect.

LACEFIELD After we developed the pointing attitudes, the crew
jSst loads those into the onboard GPC 1 s an appointing option and
that's all automatic as far as pointing the bird. It is very
easy to do.

PAO Rebecca Chase

CHASE Rebecca Chase with ABC News. Could you clarify the

reasons for the delay. Was infact time lost yesterda y while they
were performing the repairs on the antennas. If the SIR B and
Ku-band are deployed during the EVA, does that pose any kind of
danger to the spacewalkers? Is that why you want to have them
stowed away?

LACEFIELD For the EVA we stow the Sir-B antenna. And what we
are talking about doing is, also at the same time, we want to
stow the kI. And it's because of this problem I was talking
about, we aren't sure we want the doer to go ahead hit the Ku
an?enna to bring it in. We are still evaluating the beta gimbal
to see if that's an easy thing to move that antenna or not. And
right now we don't want to do\hat with the door We think we
would be better off to try to either move it with the... by
switching the motors ... using the alpha motor to do the on the

STS 41-G CHANGE-OF-SHIFT BRIEF j' KG p5j 10/7/84 12:00 noon PAGE 6

beta gimbal or then look at having the crew do that with an
EVA. Before we'd do that with the door.

CHASE Was a loss of time, though, a factor in the possibi

LACEFIELD No, we've always, you know, since we've been working
this Ku-band antenna problem, we've always been in a posture
where we knew we would have to do something with that beta gimbal
to get it inside the door closing envelope. It's just that now
we are there. So that we are off and evaluating that.

PAO Sherry Armet

ARMET Sherry Armet, ABC News. If you had a problem

stowing the SIR-B, would you use the pyro-technique device to
close it or would you just have the crew wait another day and
have the crew try to close it.

LACEFIELD There are... like we discussed yesterday. There are
three options to closing the antenna. And probably before we
would use the pyro-techniques , we would go ahead and try the RMS
again.

ARMET Well, if turned out that the RMS didn't worked.

LACEFIELD Well, it actually did work. What happened

ARMET No, I no it did. But what I'm saying, if it didn't

work when you put a, you know, restow it on Wednesday, I guess.

LACEFIELD We would do it on the... prior to the EVA.

ARMET Okay, is that a

LACEFIELD So we would take data all the way to the EVA day,
which we are talking about on flight day 7. And then if we had a
problem where we couldn't stow it, you know, and the then the arm
wasn't working, then you would have to go ahead and pyro start.

ARMET How does that work with the pyro-techniques.

LACEFIELD What they have are two little initiators that kind
of burn through and they just kind of pull the pin that allows
springs to just close the antenna. That's all that's
involved. And then we have another pryo-technique ... there are
two latches that will close the antenna at the end of it. One of
them we work with electric motors, the other we can fire with
pyro-techniques and it just goes over and locks it.

ARMET What's the substance that causes this to happen? I

mean, is it a gas

STS 41-G CHANGE-OF-SHIFT BRIEFING p5j 10/7/84 12:00 noon PAGE 7
LACEFI ELD Springs

ARMET Just springs. I mean what causes the release... is

it a gas or is it some kind of

LACEFIELD We have a little ignitor that burns that pulls these
little pins so that we release it for the springs to go ahead and
close it.

FRANK GREENWALT - Daily News in Los Angeles The flash
evaporator problem if that's not fixed would that cause any long
range problem in pre-entry.

LACEFIELD What we feel the problem is that we have over temp
and under temp protection in the flash evaportors. And what
happens is what we were trying to do this afternoon, is we were
trying to dump the water supply system through the flash
evaporator. About an hour into that dump, the FES stopped
working. And what that means, and we've got protection,
automatic protection in the circuits so that if it thinks it sees
ice in the assembly it shuts itself off. And that's what
happened. So we are just going to sit there. And we do have
some thrawing procedures to get rid of the ice and we should be
back in business here. I'm not sure whether we will be back in
business today, but in a day or so. So there shouldn't be... and
we are talking about the topper and we will be using the high
load for entry. So we should be in good shape.

GREENWALT And also, why was it used in orbit. You have that
other system you generally use. Is that to prevent ice from
forming on

LACEFIELD Oh, why are we using the FES for the water dumps?
Just so that we don't get... it's for the payloads, that we don't
have a contamination problem.

JULIE O'NEAL - Canadian Press Do you still fall short of your
target or are you back up to 60 sites 44 investigations?

LACEFIELD On the SIR-B data?

O'NEAL Yes.

LACEFIELD I'm really not sure where we are at right now. We
are back to where we should be back in about the 50 percent ball
park that Doctor Tilford was talking about yesterday.

O'NEAL And can you clarify something for me in terms of

space to ground communications. There is just one hand held
microphone, right? If somebody wants to say something. They
have to have the mike.

STS 41-G CHANGE-OF-SHIFT BRIEFING p5j 10/7/84 12:00 noon PAGE 8

LACEFIELD We have more than one hand held microphone. And
this crew is using the speaker boxes also. We usually don't have
too many on with the speaker boxes on because then you have
intef erence .

O'NEAL So what's the potential for talking, can someone

blurt something out any moment they want to?

LACEFIELD
want to.

The crew is always free to talk to us any time they

O'NEAL

Thanks .

PAO

Dan Molina from NBC

MOLINA Continuing on with this business about the flash

evaporator. Since you are going to do water dumps, as you say
you didn't want to do because of the contamination potential, are
you concerned about the contamination potential then.

LACEFIELD We are working that with the payload people right
now, and it looks like this afternoon with the data tapes we
have, it will not be a problem.

MOLINA On the space walk, because of the two of them are

going to be concerned with other things that have come up, what's
left of the original space walk plan, the hydrazine transfer
business, are they still going to have time for that or is that
the lowest priority

LACEFIELD Right now we are still evaluating that plan. We are
still planning on doing the ORS hook-up. And it's according to
how much activity we have to do with the Ku-band antenna to find
how complex it is. If all we have to do is go out there and move
it, that's a pretty easy thing to do.

MOLINA I was curious as to how many of the things that have

come up on this mission have come up during simulations. How
much is it is unrehearsed.

LACEFIELD The FES problem we have had today, is something we
have practiced in SIMS. The tilt problem that we solved today,
we have practiced in SIMS. Most of the stuff that we are
seeing, a lot of the IFM procedures that we have done, we have
practiced in SIMS. SIM soup is very active with us.

PAO

Mike Mechum

MECHUM I know that there has been reports that Leestma has

had good success with his transfer so far. Can you tell a little
bit about what kind of data he is getting... is it showing the

« — — :

STS 41-G CHANGE-OF-SHIFT BRIEFING p5j 10/7/84 12:00 noon PAGE 9

kind of model as far as temperatures for the hydrazine that you
expected. How is that going?

LACEFIELD I'm glad that you brought that up as I forgot to
mention that. We did do the two way transfer this morning, which
is where we tranf erred from tank 2 back to tank 1. We were
predicting that we would transfer 127 pounds in 32 minutes and we
did 128 pounds in 33 minutes. So the predictions are right on.
The temperature and the pressure prediction we were looking at
for cutoffs are exactly what we were predicting. And that is
very good. And we are going to do in three hours from the time
we did the last transfer, we will be doing the other transfer.

MECHUM Now, previously you had expected to do transfer, I

believe, was Saturday, Sunday, none on Monday, none on Tuesday,
then you coming back on Wednesday and Thrusday and did
transfers. If you do an EVA on Thursday, that would leave one
day for what looked like to me a transfer. Is that mean you
might swap one of the transfer that you had previously intended
to do after the EVA forum or are things going so well that you
can write out one of the transfers as not necessary for data
tape .

LACEFIELD The transfer plan is under evaluation. And I'm not
sure whether we are going... what we are going to do with the
transfers. I know that we are going to have to work on the
schedule on a couple of them. But I don't... we haven't discussed
deleting any transfers.

PAO We'll go to Kennedy after this question, and then

come back here for your remaining questions. Your name and
affiliation?

ELLIE TESHER - TORONTO STAR It appears to me from the

schedule that the EVA is going to take place when some Canadian
experiments were to take place. Does that in any way
interfer . . . will they be rescheduled or will the Canadian program
be cut back?

LACEFIELD No, we are not planning to cut back any of the
Canadian experiments.

TESHER Will they be rescheduled?

LACEDFIELD Yes, they will.

JIM ASHKER - THE HOUSTON POST A follow Up on that.

Are you going to have the press conference for the Canadian?

LACEFIELD We are actively working the press conference. That
is something that still has to be done.

STS 41-G CHANGE-OF-fHIFT BRIEFING p5j 10/7/84 12:00 noon PAGE 10

PAO And now to Kennedy.

KENNEDY Please identify yourself by name and affiliation

JAMES FISHER - with the ORLANDO SENTAL A couple of

clarifications. You mentioned something earlier about the
possibility of still taking some SIR-B data after the astronauts
did something with the Ku-band antenna in the bay. Could you
explain th at aga in. What that scenario might be that might allow
you to continue to take some data. And I have another question
after that.

LACEFIELD What we would do is we would go through another
exercise like we did this morning, where we had developed another
pointing vector so that we could point the Ku at TDRS.

FISHER Okay. Also just something I wanted to make sure I

understood you. Did you say that you expect to get about half of
the data from SIR-B as you had originally planned using this idea
of aiming the shuttle.

LACEFIELD That's a very rough estimate and that's what we
received in the press conference yesterday ... that the project
management of the SIR-B discussed. And I'm just... all I am doing
is giving you about the same numbers that he gave us.

ROBERT LEE HOOKS - ATLANTA CONSTITUTION I wonder

if you could just tell us concerning the Thursday EVA, how much
longer that might run. Originally was what about 3 hours, will
it be extended in time.

LACEFIELD I'm really not sure right not. It will since we
are picking up activities on that it does look like it would be
extended, but as how long it would be extended I just don't know
at this time.

BOYLE - TIPTON CONSERVATIVE On a non stirable Ku-

band antenna, is there an idea direction that you could have it
pointing as far as having to move the orbiter?

LACEFIELD There probably are some idea positions to point it,
but what we are looking at for say orbiter attitude and
continuing with data tapes and doing the dumps also, but with
what we are talking about being able to stow the antenna so that
the antenna clears the sill as we do the stow procedure, it's in
about the right attitude except for the beta gimbal

WALTER BAGLEY - ROUTERS Could you... there has been a

lot of discussion about a Thursday EVA instead of a Tuesday
EVA... would you please clarify what the official position is now,
whether there is still an EVA plan for Tuesday or whether you are
going to postpone it till Thursday.

STS 41-G CHANGE-OF-SHIFT BRIEFING p5j 10/7/84 12:00 noon PAGE

LACEFIELD The official position as of this moment is the EVA
is still scheduled for flight day 5. We are seriously
evaluating moving it to Thursday and we should have word on it in
the next shift or so.

KENNEDY We have one more question.

STEVE SCOTT - WMEL in Melbourne I just wanted to

clarify. . .does anything else lose data as a result of this Ku-
band problem or is it just the SIR-B?

LACEFIELD We are actively working with the other payloads so
that we can minimize any impact on the other experiments. As far
as the exact impact, I'm not sure of. But we have attempted to
minimize that.

KENNEDY That's all from KSC.

PA0 Thank you, back here in Houston. Right here please,

LEE DYLON - LOS ANGELES TIMES How many more dumps do

you expect with the SIR-B. Is this something that will happen
frequently during the remainder of the f light .. .what 2 or 3 times
a day ... or what?

LACEFIELD Ahh, that's what we are planning. As far as exact
number of 2 or 3, I'm not sure of, but we are planning several
dumps during the days. Like today, we are doing 5 oumps. And
that's because they do a data tape and instead of changing out
tapes in the high data recorder, we come up over TDRS and we just
dump it to the ground. So we are staying on the same tape that
we started out with this morning and we are going to do 5
complete... you know, fill up the tape with data routines and then
dump it. So we are not... we have not gone back to the one tape
that we used up yesterday. And we have not dumped that yet.

DYLON You're not dumping ... you can do it live and dump at

the same time, can yo-

LACEFIELD What we do is we take a high priority data tape at
the front end of a TDRS pass, maneuver to our pointing attitude
and then dump that, the high priority data during the 20
minutes. . .the bottom 20 minutes of our TDRSS data pass.

MORTON PAGE On the first SIR-B data dump, I believe, that only
76 percent of the data were usable is that likely to continue
with all the other data dumps?

LACEFIELD What we were planning on is filling up the tape.
Where we started out this morning is the tape was 70 percent
there.. 70 percent used and so we just dumped that amount.

STS 41-G CHANG E-OF- SHI FT BRIEFING p5j 10/7/84 12:00 noon PAGE 12

PAGE Oh, but the other 20 - 30 percent is lost, is that

it?

LACEFIELD No, it is not lost. Where we started this morning,
we had only used 15 minutes of the 20 minute tape and we dumped
for 15 minutes. It's a one to one timeline data versus the dump.

PAO Mike Mechum

MECHUM Can you help us with any of the actual targets thats

weren't done this morning on SIR-B? Exactly which parts of the
globe they looked at

LACEFIELD That would be something we would have to save for
the SIR-B people.

PA0 Yeah, maybe you can catch Dr. Tilford in the back.

Craig Covault

COVAULT How much large format camera activity did you get in

this morning?

LACEFIELD My words with the payload officer as I went off
shift was I said, "How are we doing LFC wise. And she said we
are doing extremely well." So I take that to mean that we've
done just about what we wanted as far as LFC operations this
morning .

COVAULT Okay, and on a possible trim burn. Is it correct

that you are trying to set up a precise orbital period with a 121
nautical ... what orbital period do you have now versus what your
target was... how many seconds are you off.

LACEFIELD Where we are right now is we arr about 120 by 122
and what we would do is we would do a trim burn to just circuit
at 121. So that we stay on the right plan for SIR-B data tape.

COVAULT Well, are you less than a second off or is it

LACEFIELD We are right on the edge of the evelope of the
requirements of where we need to be right now. We are right on
the edge. We plan to do these trim burns every day or so. And
this one that we are talking about this afternoon would be very
small. .. .around 4 feet per second.

PAO

Any one have anything else. Rebecca Chase

CHASE I just want to make sure I understood this business

with the data being cut by 50 percent with the Ku-band in its
fixed position. Is that correct and why exactly is it cut so
much and what impact does this have on the mission.

SM U-0 CHAN6B-OP-8H.pt DR I F.FI NG p 5 , 1./7/.4 ».»0 noon PAGF -

originally going to do the SIR b. ^ have e K u : band

the data tapes, and then we were g y downlinking the

« have'toTec £ { - t on the^high da.recorder
SWo^ date^es anfpointVhe antenna at the sa.e tr.e
And so it's recorded transmission instead of 11*.

transmission.

LAC EF I ELD .... That ' s tight.

.L ia hAve on the mission then
CKASE And what impact does this have

if you data is cut in halt.

ctr-r Df Tilford back there
LACEFIELD For the impact on SIR B, Di
would be the one to ask.

► is fixed - immobile - as opposed to

p A0 The antenna is cixeu

fixed repaired.

LACEDFIELD That's right.

Do you have to re-vector the whole
S.^efcrtlme you do a d.K Sump do you have to re-vector

w ; at-r^ihude that we

LACEFIELD No, we. are using ^e same point ing^tt ^ ^ ^
developed this morning on all b
this afternoon.

.EM. to^ectof Tl^^ ^ - ™ '"^
bit? .. . !,

LACEFI ELD .hat • . one ^^.^"o. ~v^^!2 SSl^nd
-tfnnL^And^e are-n.rsi e ? ^1^^^^°^
E^^tS^SnSI'tS; southing we wou!d haee to

do
PAO

Anything else, anywhere. Jim Ashker

ASHKER . X -ess ,m not clear on why -impact ^n^he data

e f r iSd 8 i5l!i; 8 .«l5 1n't y h°e U mis°sIon still and I don't know why
half the data will be lost

ICEFIELD I thin, we a re at the pointy io^-f- p «* have
got the antenna back working, we

STS 41-G CHANGE-OF-SHIFT BRIEFING p5j 10/7/84 12:00 noon PAGE 14

program, and I think we will have better numbers and we need to
go off and evaluate that now that we can look down stream and see
what data we can get. I'm not sure that is still a real good
number. And that will be determined here shortly since we have a
plan to go after those SIR-3 data tapes.

ASHKER Is part of it because if it were working nominally

you would be able to gather and send it at the same time.

LACEFIELD That's right.

ASHKER Okay.

PA0 Mission Control just tells me that payloads officer

reports that they have looked at all land masses tnat ?ere
request by SIR-B, and they renumerated them and I didn t catch
them all, but I will ask him to repeat them on the loop after the
press conference ends here. Anyone have anything else? Okay,
not, thank you and thank Cleon.

END OF TAPE

STS 41-G CHANGE-OF-SHIFT BRIEFING p6j 7:30 PM 10/07/84 PAGE 1

PAO Good evening to you all. We have with us again

John Cox, Flight Director, to bring us up to date on tomorrow's
activities and today's past.

COX Thank you. Today was, what I'd call probably the

first really good day on the flight plan. The ERBS day was super
too, but that was a good deploy, just took us awhile to get
there. But today we finally got the SIR-B up and operational and
appeared to be taking all its data, so now all the experiments
that we're carrying onboard are up and operating and doing
exactly what they were being flown to do. In a quick summary,
the maps, the file, the SIR-B, the large format camera, all took
the data that they were originally planning to take today and we
all feel real good about that. The reason that SIR-B was finally
able to join the club was that the trick with pointing the Ku-
band antenna worked. We were able to put the orbiter over and
point the Ku at the satellite, we acquired and we've been getting
very good dumps. Bit air rate is possibly even a little bit
better than normal and we're very happy with the way that's
working. We had, also a report from the ERBS people - they had
performed the first translation burn, it was three hours in
length and they are in a 228 circular orbit right now. They have
a couple of more burns, a six hour and a five hour coming up
tomorrow and the day following, which will take them up to 352
miles as they head up to finish up setting up for their
lifetime. Today we also concluded that the Ku dumping was going
so well - what we're doing is recording the high data rate data
on a recorder for the SIR-B folks and then going to an attitude
that allows us to dump to the satellite. That all is going so
well that we decided to go ahead and move the EVA day to flight
day 7, still keep the normal flight duration and allow the SIR-B
to continue to take data. The reason we're moving the EVA day is
there is some consideration that we'd like to be sure that the
Ku-band antenna is suitable to bring in for entry in the best way
we can and so we're working an IFM in that area, that we'd like
to - it takes some cooperation from crewman in the bay to
maneuver the dish for us since we don't have any gimbal drive
control on the Ku-band gimbals now. If that works and we're able
to pin the gimbals the way they're suppose to be for entry and
the Ku-band antenna dish could be redeployed to allow some more
SIR-B data taking it at the end, however, if that doesn't work,
we'd want to tie the dish down for entry and we'd probably do
that during that same EVA. So because SIR-B has the chance of
maybe having her lifetime cut short by our Ku-band antenna, we've
gone ahead and moved the EVA down further. They also still had
some problems to overcome on the way their antenna latches and
they have a test set up that will probably run over the next
couple of days to see that their antenna latch problems have gone
away. I think you'll have a copy of - or one is being made
available to you - the summary timeline for the next - for the
rest of the flight with the highlights on it and I don't think
there is probably any surprises on there. We have moved some of

STG 41-G CHANGE-OF-SHIFT BRIEFING P 6j 7:30 PM 10/07/84 PAGE 2

the events around as you can see We've had to "^just the ORS
transfers and that's to get the hydrazine in the right tank at
the right time to do the EVA and to be ready for entry.
Everything else on there is pretty much standard, ]ust in
differed places. With that I'd be happy to take questions.

PAO

Craig. Tell us who you are please

Craig Covault, Aviation Week. On the ORS
transfers, go ahead and take a minute and tell what -tell me
what you'll do tomorrow that you were normally going to do a
little bit later.

cov Tomorrow is the unusual transfer. We're going to

transfer from tank 1, all the hydrazines is in tank 1 now after
we've completed today's transfer. We're going to do a
pressured transf erf rom tank 1 to tank 2 - it'll be performed
in wo stages. Normally that transfer would have only occurred
after the EVA and it would have been through the EVA fitting.
EVA fitting is not hooked up rightnow, so we're going to go back
through the bypass line, transfer in to tank 2. That will be an
activity we do tomorrow. We will then have to get all the
h?d razine back into tank 1 again prior to the EVA, and to do
that? we will do the normally scheduled 4:00 a.m. 4B transfers
which were a priority set of transfers that the ORS people wanted
to accomplished, so we'll go ahead and move back m, we'll be all
set thin tot the EVA. Following the EVA, we'll probably only do,
since the EVA is the day before, the day before entry - we won't
have time on the day prior to entry to do both transfers , so
we'll do the first half transfer and then we're still Dust trying
to decide how we want to leave it, either leave it with a half a
transfer and let it thermally stabilize - which is a completely
adequate case for entry or go back and fill tank 1 up again and
do entry that way. That's the way we ' d planned to do entry and
its just a small desirement to do it that way.

Carlos Byars, Houston Chronicle. John, how about
the operation of the other major experiments onboard, for
example, how much - could you give us a percentage of fata that
you've so far perceive as completion - for example on large
format camera maps, file?

COX Today, they all got a hundred percent for what they

were trying to do today. Up to this point in the flight though,
? "hink we probably have some reports out and I'm, I don know
the exact numbers of how everybody's doing. Obviously SIR-B has
been down in the noise and everybody else has been up pretty
close to spec. Large format camera has loss some due to the fact
that we been in various attitudes, we were in the ERBS deploy
attitude lor awhile and so their not up to a hundred percent but
while SIR-B was not driving off the timeline, over the last
couple of days, they've been making up ground so they may have

STS 41-G CHANGE-OF-SHIFT BRIEFING p6j 7 : 30 PM 10/07/84 PAGE 3

recouped all that by now. I would say - you know everybody is
close to full except SIR-B.

Frank Selzer, CMM. One question on the hydrazine
transfer. After the EVA, are you going to do just a partial
transfer, is that - will that give you enough data to know how
the coupling worked and...?

COX The folks feel that it will, normally the only way

- we stopped the transfers halfway just to keep the pressures
down which could reflect itself into higher temps in the tank
which arn't showing up in your telemetry yet. Half a transfer
will probably show you all the data you need. You'd like to get
the whole thing but that's - it'll still tell you how close you
are - you're transfers either being performed by subthermal ly ,
which says that you're getting good mixing in the tank and that
the temperatures are all stable and their - or its being
performed adiabatically , that's the other worst case which says
that you may have some hot spots and you're not getting good
thermal mixing. Everything we've done so far, the blow down and
the 2A and the 2B that we've accomplished today all say that
we're running closer to the isothermal line, so - which is what
most people expected that we would get some pretty good mixing
even though there's not a gravity field that would force
convection for you. So its, we believe we'll get enough data out
of that.

SELZER I just heard - kind of echos this but the - I

understand the cabin got slightly overheated and also I'd like
the status of the flash evaporator.

COX Should have mentioned that at the top. The way we

are dumping supply water this flight, or at least the plan method
was to use the flash evaporator, the topper and just step up the
freon loop temperatures going into the radiators so it requires
more water to be flashed up the flash evaporator. It quit
today. We recycled the A control on it, several times and every
time you recycled it you shoot a little extra water into it. And
then we switched over to the B controller which uses some
different sensors, we had a failure on I think it was flight 2
where one of the sensors had malfunction and caused a flash
evaporator shutdown that we kept troubleshooting that flight.
Believeing that that might be the reason, we went over and tried
the B controller for awhile but it also was quitting in the same
manner. It's kind of like trying to start your car, if you try
to start it enough times you'll probably flood it, we probably
have too much water in the flash evaporator now. And that's the
best guess that we've viced it up inside. So we're not able to
dump our supply water that way so we're back to doing normal
supply water dumps and we've got the RMS out today and we did two
supply water dumps out the normal dump nozzles using our revised
procedures that heat the nozzles up and all that and the dumps

STS 41-G CHANGE-OF-SHIFT BRIEFING p6j 7:30 PM 10/07/84 PAGE 4

went perfect. There was no problem with them. We're continuing
to leave the flash evaporator alone and allow it to sublimate now
and hoping that that ice will finally leave, I think you probably
saw last flight with the ice crystal on the side - but even if
you put sunlight on it, it doesn't sublimate in a great big
hurry. The ice that's in the FES however is thinner sheet ice,
it isn't as thick as that ice crystal was that we dealt with last
time so we're hoping that it will sublimate off more rapidly than
what we saw last flight with the ice ball on the outside, so
right now we're back to just doing normal supply water dumps
until we feel that its a good time to go try the FES again,
people trying to guess how long that is right now. And because
we arn't able to get the freon loops - the freon loop we're not
allowing to get as cold so we can put a higher heat load into the
FES to warm it up. And so the interchange with the cabin which
interchanges with the water loop is not bringing the water temps
down cool enough to aircondition the cabin as much. It's
somewhere between the 5 or 10 degree increase. We asked the crew
how they liked it, whether it was adequate, we could provide some
power down suggestions to them to lower the temp. The comment
came back that they thought it was fine, it was just a little bit
warmer but it seemed to be alright and they thought that once
they did their normal turn the lights off and everything for
sleep tonight, they thought that it all dropped down and be nice
and comfortable again. We're running probably somewhere on the
order of 5 to 10 degrees warmer than we did yesterday as a result
of this,

PAO Identify yourself Henry.

Henry Cooper, The New Yorker Magazine. Around say
4 or 5 o'clock this afternoon, was there some worry expressed in
Mission Control that the water vents were icing up?

COX Well I think that's what we were just talking

about, we've been troubleshooting the flash evaporator for quite
some time, so we're just doing normal water dumps.

COOPER I'm talking about the vents for the water as

opposed to the flash evaporator.

COX The water - no, nobody has been worried about icing

there. We're just all being real careful to use the new
procedures so we did some doublechecking to make sure that they
had - the last glass procedure changes went up as a pen and ink
change to the checklist, some of the books on the control center
didn't have them and we just wanted to make sure that the crew
did have the lastest changes and they did.

COOPER One other question, with the flash evaporators, if

you don't, if the ice doesn't sublimate by the time entry, is
there going to be a problem with cooling during entry?

STS 41-G CHANGE-OF-SHIFT BRIEFING p6j 7:30 PM 10/07/84 PAGE 5

COX No, the flash evaporator that we use on orbit is

called the Topper, it works in a lower temperature range and is
kind of a milder cooling. It's same type of a unit, but we just
use them differently. The high load, the one that you have to
have for entry to take the big heat load for entry, that hasn't
been touched, we haven't put any water in it, it worked fine
during ascent, during the first several hours of day 1 til we
finally turned it off. So there's no problem there and we expect
this one to come out working fine. And there is a procedure
that's a good verified procedure that allows you to really warm
that flash evaporator up and flush out the ice in there. We've
never done it on orbit but it's been well checked on the ground,
so we're considering maybe doing that but since the supply water
dumps are working, we're not pushing real hard to get in to that.

PAO We'll take two more and then go to Kennedy Space

Center .

Jerry Hanna from Time Magazine. To keep the
editors happy back home, could you give us an estimate on when
we're going to be able to see the first public release of the SIR
pictures?

COX There's some being processed right now that we're

coming into the building about the time I left. They said they
weren't real exciting, they were pictures of the ocean that were
the very first ones that were dumped and received on the
ground. But I suspect over the next 24 hours, you'll begin to
see them start coming in.

PAO Carlos Byars and then to KSC.

BYARS Okay, how about our old friend the WCS and I

believe you were scheduled to dump about half a tank and did it -
I presumed it worked well, would you tell us about that and the,
any comments coming down as far as overcrowding is concerned.
Habitability type things?

COX As far as WCS is concerned, we've had no complaints

and Crippen has let us know when its had troubles before so I
suspect no news is good news here and as far as the waste water
dump, that's tomorrow morning, so we'll get on with that. In
fact I think its the second dump of the day, the first one will
be the xxxx supply water dump. We fill those tanks up a lot
faster, the *• iste tank, there's still plenty of margin in it.
It's just a good time to do it tomorrow. As far as overcrowding,
I haven't heard a single comment, I'm sure every one of those
crewmen are more than happy to be there and are putting up with
whatever overcrowding they may find.

PAO

To KSC .

STS 41-G CHANGE-OF-SHIFT BRIEFING P 6j 7:30 PM 10/07/84 PAGE 6

Rick (oarble) CBC Radio News. Has any of these
changes you've made impacted on either the get-away specials or
on Marc Garneau experiments?

COX No, in fact I think there - I noticed that Marc

coLented, he couldn't pick up some of the speem views today ad
t-hah was because we were in different attitudes. His is ir you
no?icefthe wa?his cap is built, he's hoping to pick up certain
ones throughout the flight but there pretty much, he'd like to
gSfthis ^horizons !nd this many Bunsets and its pretty «uch
on a opportunity basis as they occur. So I don t think on the
whole for the whole flight, it will have any effect on him. It
may change the time order in which things are done.

PA0 We'll return to questions here, if there are any

more. Carlos again.

BYARS Anything from Paul Scully-Power? He's real quiet,

I haven't heard a thing.

COX We didn't expect to hear a whole lot, he's just

going to take a lot of pictures and we'll take a look at them all
afterwards .

BYARS

COX

PAO
night .

Are you sure he's there?

Oh, I saw him get in on one of the downlink TV's.
Any other questions? We will then adjorn for the

END OF TAPE

STS 41-G CHANGE-OF-SHIFT BRIEFING p7j 10/8/84 11:45 a.m. PAGE 1

pao Okay, and good morning and welcome to our change of

shift press conference. Mission 41-G with the outgoing flight
director! Cleon Lacefield, who will review the activities on the
preceding shift.

LACEFIELD Good morning. This morning we went ahead, and I'll
tell you what we have scheduled and what we have accomplished
this morning and give you an overview on what we have
accomplished with the experiments yesterday. And I 11 ^11 some
of the things that we are doing and where we plan to go in the
next several days. We did an RCS trim burn of 2.9 feet per
second th s morning, and that was to get us in a circular orbit
lor our data tapes! We are in a 121 by a 121. We scheduled a
supply, I mean a waste water dump this morning. We were able to
dump 33 percent of our waste water and that brought us down to
about 49 percent remaining. We were watching the dump with the
cameras. They, the crew, did watch the dump and we were using
oTr new procedure where we heat up the dump nozzle, and then dump
down to the cut off temperature. We did see a little bit of
frost form. It was nothing significant, and we went ahead and
did three cycles where we would raise the temperature up and then
dump all the way down to our cutoff temperature; then we would
cycle back and go to 250 degrees again on our dump nozzles and
then cycle back down to 50 degrees. We are going to do on the
next two revs from now we are going to do a water dump. And as
John Cox said yesteday we did two water dumps V esterd ?y "^ out MA
any problems and we expect to do to have the same luck today. We
are just going to go ahead and schedule that two revs from now.
And we are going to go ahead and af ter we check out, we do the
the water dump, we are going to do a check-out on the FES. You
may recall yesterday, we had a problem where we believed we iced
up the flash evaporator. Today, since the time we iced it up, we
have been putting warm freon through the loop; and we hope that
that has secured the problem, and we are going to go ahead and
try a restart on the FES this afternoon. We were able to do ORS
transfer 3A, and we transfered approximately 1" pounds. On
the... just a short time ago, we were in the middle of our CANEX
speam test and we have been and this morning we were taking our
SIR-B data capes. You probably have heard approximately four
hours ago we lost TORS. And we estimate that we will have i t
back on line in approximately three hours, at 2000 GMT. As tar
as what we have coming up in the flight, we are planning our EVA
on fliqht day 7. We have finalized that and informed the crew
?Sat we will be doing it on flight day 7. And we are talking
about, on flight day 5, doing the ORS transfers 4A and 4B, the
CANEX oqlow and speam. And we will do another trim burn
tomorrow. Flight day 6 we will get ready with a either a pre-
b?ief or the tend-to cabin and get ready for the EVA on flight
day 7. Flight day 8 will be an ORS transfer 3A, and then we will
qet ready and pack things up for a nominal end of mission on
fliqht day 9. As far as what we were able to accomplish
experiment wise as a summary of yesterday ... file was 90 percent,

STS 41-G CHANGE-OF-SHIFT BRIEFING p7j 10/8/84 11:45 a.m. PAGE 2

maps was 95 percent and LFC was 38 percent. So we are doing very
well with the experiments up until the time we lost TDRS this
morning which has affected our SIR-B data tapes. We are still
recording the SIR-B data tapes onboard on the high data rate
recorder. We had two passes that we were going to try to go
ahead and do our pointing routine that we would dump the recorder
through the Ku system. And we are waiting for TDRS to come back
up before we do that. And with that, I'm ready for any questions.

PA 0 Okay, we'll take questions here in Houston. When I

call on you, please state your name and affiliation. And after
we take some here, we will go to the other centers and then come
back here. Let's go ahead since you are over here, Frank
Seltzer .

FRANK SELTZER from CNN Cleon let me ask you, if originally the
TDRS was suppose to come back up in about an hour and now it is
going to be about 5 hours or so or longer, if you don't get TDRS
back up, what impact does it have on the mission. Might you
shorten it?

LACEFIELD We haven't talked about shortening the mission, yet,
because we are pretty confident that we are going to get TDRS
back on-line. And it just takes us back to where we were before
where we were recording the SIR-B data tapes on the high data
rate recorder. And where we are right now with the four dumps we
got off yesterday, we still got appoximately five or six tapes, I
believe, over there before we run out of tapes, the 20 minute
tapes, and we still haven't used the optical recorder yet.

SELTZER I understand that on SIR-B you already have lost, I

think, some passes, haven't you? That was the impression I got
earlier .

LACEFIELD We have lost, I believe, a couple passes. I'm not
really sure on how many that we've lost. Primarily what we have
lost is we haven't been able to dump the passes that we have
got. And what happened to us is we did do one recording and then
we came up on the middle of the ORS transfer, and, you might have
heard us, we were trying to get the high data rate recorder
changed out the same time the transfer. The crew was able to
change that out before that high priority tape came up on the
next rev. So we were able to pick that one up so I not really
sure that we have missed that much.

SELTZER One other question, on the cabin temperature. What

is it now? Has it come back down? It was pretty hot in there
this morninq. I heard Crip talking about that as you were trying
to get rid of the ice on the flash evaporators

LACEFIELD When we started out this morning, when we came on
shift, we were at 83 degrees. We went up to 90 degrees in the

STS 41-G CHANGE-OF-SHIFT BRIEFING p7j 10/8/84 11:45 noon PAGE 3

cabin. And these are estimates because this is with that
transSucer that we... could be two degress less than this. And
right now we are probably a degreee or so less than the 90. We
have come down. And what we did is we were trying to get the
higher temp freon through the FES so we could do the checkout
today. We have now gone back to norm and we expect the cabin
temp to go down approximately 7 degrees since we have gone back
to norm from the high level setting.

PAO Okay, Craig, you had one?

CRAIG COVAULT - AVIATION WEEK What's the objective behind
doing the second OMS pod survey?

LACEFIELD What we were hoping to gain on the second OMS pod
survey is that when you look at the way the high impact tiles are
sitting and then you have the frizzy. The tiles are on the order
of like this thick and the frizzy's like 6 tenth of an inch. And
what you've got is you've got a wedge frizzy and then your are
covering it with another wedge of frizzy. What we hope to see
with the good lighting that we had today was to see if that
second la?er or that bottom wedge of frizzy was still there with
the RTV. That would, if that was there, the impact would be 3 ust
about nil as far as the turn around. And that is what we were
looking for and we haven't seen it yet. And Crippen's comments
were, is he couldn't really see anything on his monitor because
he is looking at black and white and we recorded that, you know,
with the color cameras. And so we hope to see a color contrast
there so we that can pick out that frizzy. If its still there.

COVAULT Okay, and a second question. Have you started to

play the game, even in general, yet, Edwards versus Kennedy m
weather trends.

LACEFIELD Well, that's an interesting thing to bring up. With
Josephine motoring towards the Cape. They are expecting
Josephine to be up to 50 knot winds, I guess , tomor row, is what I
heard on my weather briefing this morning. It is suppose to, it
Sheading west kind of north and west but there is a high ridge
of pressure... a high pressure ridge... up above the Cape that will
probably push the storm due west which will take it right over
?he Cane. If that's the case, it will pass over the Cape and it
will be clearer at the Cape in the Thursday-Friday time frame,
but we also have got a low pressure that is pushing towards
SSsephiSe? and they are afraid that might push it back over the
Cape. So we are just going to have to wait and see here for
awhile to see where Josephine goes.

COVAULT So have you started any pools in Mission Control

LACEDFIELD Well, we are flying with Crippen.

STS 41-G CHANGE-OF-SHIFT BRIEFING p7 j 10/8/84 11:45 noon PAGE 4

PAO Okay, Mike Mechum, you had one also?

MECHUM On the cabin temperature problem, is there. .. because

you've got more bodies onboard than normal, is this influencing
or adding to the problem in any particular way?

LACEFIELD Most of the problem with the cabin temp being up is
because of the lights and the CRTs, its the usage, the electrical
load that we have got in the cabin. We are really not being hurt
that much by a couple extra bodies.

MECHUM We haven't heard anything to indicate that there has

be^n any particular problem with the number of people onboard.
How is it looking from Mission Control's view with seven people
working all the time.

LACEFIELD So far everything is looking pretty good. We
haven't had any complaints. The potty seems to be doing very
well .. .haven 1 1 had any complaints. And really that's what we
were kind of worried about, you know, for this flicS,.
Everything else, the crew seems to be in excellent i>pi.< its. And
everyone is taking data and doing their experiments.

PAO Okay, right back here.

DAVID DICK - CBS Is a heavy burst of cosn Lc radiation somewhat
similar to a Texas storm. It comes, it goes, it may or may not
cause damage. How sure are you, or do you think you will be
later, that the TDRS is okay.

LACEFIELD I really don't know the TDRS status. By what you
heard is about all that I heard. And we are still waiting to
find out what the status is. We do know that we think that we
will be able to get it back up, you know, so that we can use
it. But as far as knowing any more than that, I really don't
know .

DICK There has been a good deal of speculation, as I'm

sure that you know, that the mission might be shortened. Has
there ever been any serious consideration of shortening this
mission. Any discussion of it.

LACEFIELD We have not discussed it in the Control Center. We
are pressing towards a nominal end of mission with like what we
stated yesterday with an EVA on flight day 7.

PAO Okay, this gentlemen right here on the end, right

there by you

CLAUDE LAFLOR - QUEBEC SCIENCE MAGAZINE Since you use TDRS is
this the first time you lose it this morning?

STS 41-G CHANGE-OF-SHIFT BRIEFING p7j 10/8/84 11:45 noon PAGE 5

LACEFIELD We have had problems with TDRS before. We have had
problems with the ground station. I'm not sure that we have
problems with TDRS during a shuttle flight. We have had problems
with ground stations during the shuttle flight.

LAFLOR No, but, I mean, with cosmic reburst. This is the

first time it has happened?

LACEFIELD I'm not sure what happened with the satellite. And
I'm not sure anyone is right now as far as what's happened there.

PAO Okay, Paul

RECER On the cabin temperature, do you know what the

humidity was when you are up to 90 degrees temperature what was
the humidity in the cabin.

LACEFFIELD I really don't know. That would be something I'd
have to find out for you.

PA0 Humidity is 37 percent right now the Control Center

says .

RECER Okay, one other question. You got TDRS knocked out

by cosmic radiations or whatever, do you have monitors onboard
the orbiter that picked up any indication of such radition

LACEFIELD We have no reports of any problems onboard.

RECER Well, do you have any monitors

LACEFIELD This is all... we do have the radiation monitors
onboard. We haven't heard anything from the crew.

RECER Is the information from those monitors relayed to

the ground automatically or does the crew

LACEFIELD They will tell us if they see anything that looks
like funny.

PAO Okay, Carlos, right here in the front

CARLOS BYARS - HOUSTON CHRONICLE Cleon have we heard anything
yet from Paul Scully Power?

LACEFIELD Well, you know we saw him copying data when Marc was
going through his thing. He did come up yesterday with his own
little voice, and he told us that he liked the BUS OPS and that
he was getting some good pictures. And to my knowledge, that s
the only words we have heard from him.

STS 41-G CHANGE-OF-SHIFT BRIEFING P 7 j 10/8/84 11:45 noon PAGE 6

BYARS He's there. Has any members of the crew requested

any private medical conference.

LACEFIELD No, there have not been any PMCs.

BYARS Anything from Marc Garneau on how his space sickness

experimental work is going?

LACEFIELD He gave us an evening status last night. I'm not
snve U he mentioned anything on that or not. I'm not aware of
it.

pA0 okay , Henry Cooper or the fourth row back here.

COOPER I was wondering whether the loss of memory in the

S£s means it lost attitude or anything more serious could have
happened to it.

LACEFIELD I don't have an answer for that.
PA 0 Right here in front of me.

BILL BROAD - NEW YORK TIMES I'm confused about whether the
TDRS loss means that your are just not going to be able to
tansmit data or is it also affecting the acquistion for the SIR
B.

t arpPT fld The SIR-B is still on... you know, we are still going
ahead and taking our data tapes onboard. But we can't transfer
that data from the high data^recorder to TDRS from down to the
ground.

BROAD So it hasn't affected today's program of data

acquisition at all.

LACEFFIELD It might may have on a pass or two when we were
trying to figure out, you know, where we were going and as far as
changing out'the tapes^ecause at one time we had figured we
would be able to go aheazd and dump a tape. And that s the tape
we hade to change out in a hurry, you know, righ t aft er the ORS
transfer. And we might have missed some data in that time
per iod .

PAo Right here, with Time.

DAVE JACKSON - TIME MAGAZINE Couple questions. One about the
temperature, when was it 90 degrees. What day, what time of day.

LACEFIELD It's been, lets see when we woke up, it was 83 and
it go up to, what happens, what brings the temperature up, is
the crew turns on the lights and they bring up the CRT .And so
probably an hour or maybe wo hours after they got up this

STS 41-G CHANGE-OF-SHIFT BRIEFING p7j 10/8/84 11:45 noon PAGE 7

morning, it climbed up and leveled off at the 90. And then after
it had gotten up to the 90, we went ahead and took the radiators
back to norm and instead of the high so that we could start
decreasing the temp. And that's a slow process. That will
take, that's a time, it's going to take a period of time for that
temperature to go down.

JACKSON Okay, and I remember from pictures of the last

mission Judy Resnick had on some shorts. Are they wearing shorts
now and what are they doing to combat that heat. It's got to be
just terribly uncomfortable.

LACEFIELD Well, with our TDRS problems today, we haven't had a
lot of downlink TV. So I really don't know what they are
wear ing .

JACKSON And the last questions was do you know yet what

caused the damage to the insulation and the tiles?

LACEFIELD We still don't have an answer for that.

PAO Okay, right back here in third row.

HAROLD HAZEL - CBS NEWS With the weather constraints as they
are, and TDRS being down, first of all how long will TDRS have to
be down for Mission Control to seriously consider shortening the
mission or would you op to lengthen the mission until things were
sorted out both weather wise and with TDRS.

LACEFIELD Let me say that the weather at Edwards is
excellent. So, as far as being able to come down and land some
place, the desert is doing fine and it's expected to stay fine.
We are not considering lengthening the mission. And we would
like to go ahead and perform the EVA. And we would like to also
bring the Ku antenna back in when we do the EVA. And what we . <-e
talking about is a procedure that Pinky and Jerry Ross are going
to do in the wet ap tomorrow to verify that we can being the TDRS
anten the Ku-band antenna in and pin it. And what we are going
to do is we will do an IFM procedure so that when we get the crew
to align the antenna so that we can drive the wedges in so that
we can lock the antenna. And we would really like to be able to
do that just so that we don't encure any damage to the antenna or
the radiator during entry. It is not a safety of flight problem
at all. We are are just looking at turn around on the vehicle.

HAZEL Yeah, but with as many objections apparently

completed or near completed, how long would TDRS have to be down
for you to seriouly consider looking at shortening the mission.

LACEFIELD I really don't have an answer for that now. The way
we are still going at the present time, is we would try to use up
all the tapes, we would try to use up the eight hours of optical

STS 41-G CHANGE-OF-SHI FT BRIEFING p7j 10/8/84 11:45 noon PAGE 8

recorder, and then we are looking at flight day 7 for the EVA,
which isn't too far from now. And where we are right now, we
will probably just get there as far as filling up the tapes and
doing the optical recorder stuff.

PAO Okay, right here, this gentlemen here in the front

FRANK GREENWALT - DAILY NEWS LOS ANGELES I am a little bit
unclear about why the water tanks were allowed to get so full.
Was it because you were worried about contamination of the
experiments during the standard water dump?

LACEFIELD The r eason . . . what 1 s going on is... the way we
normal... the way we planned to dump water on this flight was to
use the FES. When we iced up the FES yesterday, we did a couple
of water dumps yesterday evening that brouhght us down to a
pretty good condition. We tried to do a ... then we had the TDRS
problem and so what happened while we are doing this the tanks
have filled up. And so we scheduled a dump, what we tried to do
was move everything up a rev... we were going to do the water dump
2 revs. They were not able to do the speam on rev 51. We were
going to just say okay we'll flip flop since we can't do the TDRS
track and water dump, we'll do the speam a rev early. And then
on the second rev where we were going to do speam, we will do the
water dump. What happened was that they couldn't get set up in
time so we wound up doing the speam on the nominal rev and we
delayed the water dump a rev.

GREENWALT And also, the cosmic ray problem, if that was the
thing that caused the TDRS. Is there any way to project that
type of thing happening, I mean, I'm wondering if this Murphy's
law, happen again and maybe once you get the memory loaded, you
get another burst of cosmic rays and then back where you started
from. Is there any way to project that at all?

LACEFIELD Not that I'm aware of. That doesn't mean that there
isn't a way, but I'm not aware of it.

PAO Okay, right back here and then we will have one over

there and then we will go to KSC for questions and then come
back .

JULIE O'NEAL - CANADIAN PRESS What is the normal temperature
in the cabin. Whav should it be?

LACEFIELD Up until we had the problem with the FES icing up,
it was 75 degrees.

O'NEAL 75 and you expect it will get back down there within

a few hours?

STS 41-G CHANGE-OF-SHI FT BRIEFING p7 j 10/8/84 11:45 noon PAGE 9

LACEFIELD If we get the, when we do our FES checkout
procedures, and we get the FES back on-line we'll be able to
bring the cabin temp right back on down.

O'NEAL And I don't quite understand the FES problem.

LACEFIELD What happened is yesterday, remember, we had the
problem where the flash evaporator system iced up °J us. What we
had to do is we had to go to radiator flow to cool the freon
?oops? And it goes around and you have the freon and then you
have the water which takes the temperature out of the air.
I?'s...we have freon loops that cool water loops and then we have
Jhe?::we are cooling the air. So what happens is when we let the
freon temp go to this high setting which is 57 degrees to thaw
o" this little ice ball in the FES the cabin temp inched up.
And that's where we were. When we got up to the 90 degrees, we
Sent back to norm; and we think we've heated the FES up long
enough cause its been about 20 hours, that we can go ahead and do
a SS?mal FES start up and get back to where we were. We think we
have kept the FES warm enough to clear the ice.

O'NEAL And is there some fan system or something if this

doesn't work?

LACEFIELD If this doesn't work, we'll just go . . . what «J plan
to do is use the... we've got a couple options. If the normal FES
s?ar? up doesn't work, we have a ice... a de-icing procedcure that
we will try tomorrow. Where we will bypass radiators and put 90
degree freon. .. temperature freon in the FES tomorrow and try to
melt it out.

O'NEAL Thanks

LACEFIELD And that will be over a very short time period that
we will do that.

PA0 okay, right back here and then we will go to KSC for

questions

REBECCA CHASE - ABC NEWS You have already lost some data with
the problems with the Ku-band and now with TDRS out you ve
already lost some passes and obviously waiting to see whether
?hU problem gets resolved. How does this effect the impact
nf how does this impact on the mission. Are you still going to
accomp?Lh 11 man? goals, I mean, each day aren't we diminishing
what's being accomplished here.

LACEFIELD Where we are right now is we've still got enough
tapes available that we can go ahead and record on the tapes for
today. And it really shouldn't affect us . It's 3ust that
instead of being 5 tapes to the good that you've got with nothing
on them, we would be down a couple more tapes. And then we would

STS 41-G CHANGE-OF-SHIFT BRIEFING P 7 j 10/8/84 11:45 noon PAGE 10

qet to the Ku pointing routine that we worked up and we would
!?art? w would fill up a tape and dump it so that we wouldn't
beinq using that tape up and would be reusing it. So except for
the datS we lost when we first went into this this moving we
should be in about the same situation. Except we won't have as
many spare tapes.

CHASE But that assumes TDRS comes back up.

LACEFIELD That's right.

CHASE

What is the worse case scenario if it doesn't?

LACEFIELD If is doesn't, we are back to where we use up the
six tapes that we had plus the 8 hours on the optical recorder

PAO The report from the control center on the loop here

says they have got ?ight now four tapes available, and they have
got the fifth one in the high data rate recorder right now.
We'll go now to JSC for questions

TAMES FISCHER - ORLANDO SENTEL Earlier when you were
motioning the percentages from yesterday on file and maps, you
slid So percent. Was that 90 percent on what you had hoped to
accomplish yesterday or 90 percent of what you had hoped to
accomplish throughout the mission?

LACEDFIELD The numbers that I gave you were 95 percent of what
we had hoped to accomplish yesterday.

FISCHER Also on SIR-B, do you have any better feel today

than yesterday for, if TDRS gets back up, for how much of the
to?ai y amounf of da^a that you had hoped to collect, how much of
t-hat will actually be collected. There was some thought
yesterday ?ou might be able to collect more than half of what the
optimum was.

LACEFIELD I think I'm still in the same posture as the
question I just answered just a little while. ago. All we are
going to do is fill up more tapes until we pick up TDRS. If
that's the case, we should still be in about the same place.

FISCHER Okay, thank you.

ROBERT LEE HOOK - ATLANTIC CONSTITUTION I wonder if you can
today tell us anything more about any modifications to the
Thursday EVA. Any additions in activity?

LACEFIELD What we are planning to do on the EVA are two
thinqs. The ORS transfer and bring or aligning the Ku-band
antenna, and then driving these little plugs to pin the
antenna We are planning to do both those activities, and we

STS 41-G CHANGE-OF-SHIFT BRIEFING p7j 10/8/84 11:45 noon PAGE 11

expect that pinning the antenna will take us apporximately an
hour longer. Those times will be developed tomorrow when we do
the wet F exercise.

HOOK But you anticipate it will run about an hour longer?

LACEFIELD Yes.
HOOK Thank you

BILL HINES - CHICAGO SUN TIMES You have three ai r-to-grounds
scheduled during the remainder of this. The Canadian experiment
conference, the press conference and the presidential phone call.
Can you tell us when those are going to happen according to your
present line.

LACEFIELD The current schedule I have for the presidential
phone call is on flight day 5. The exact time I'm not sure, PAO?

PA0 Okay, I think the television people are telling me

that may have gone away so we will find out exactly what the
schedule is on that here shortly.

HINES You mean the presidential phone call may not occur

because of this whistle stop trip.

PAO Yeah, I believe that's correct.

HINES What about the other two, the press conference and

the CANEX conference.

LACEFFIELD Just a moment. As I understand it the CANEX
conference was the presidential phone call. And the press
conference will be orbit 68 at 10:38 in the morning tomorrow.

RICK MEGINNIS - CITY BROADCASTING CORPORATION We are pleased
of course, to hear that the CANEX and the Reagan call are the
same thing although somewhat surprised, but my question though
is a query my editors tell me at home, one of the things SIR-B
would do today was a scan over the prairie providence of
Saskatchewan, which is in a very bad grate right now, the
Canadians would probably like to see your information on that.
Have you had a specific request from the Canadians for a scan
over there. Is so, has it been done, and when will the
information be given?

LACEFIELD I'm getting a yes on both of those from the SIR-B
people. Both those questions.

MEGINNIS Could you elaborate?

STS 41-G CHANGE-OF-SHIFT BRIEFING p7 j 10/8/84 11:45 noon PAGE 12

LACEFIELD I understand the scan took place yesterday and the
data won't be available for sometime, I believe, postf light.

MEGINNIS So it has been done. There was a request and it has
been completed.

LACEFIELD That's right.

WALLIS IMIN - GLOBE AND MAIL TORONTO Could you characterize
the condition of Challenger on this mission to its condition in
previous missions. Are things going better than you expected?

LACEFIELD As far as the systems on Challenger, except for the
ice fall and the FES, and the Ku-band antenna, everything is
workinq great. The RCS system, the ECLS, everything else is
doing just perfect. We haven • t had . . . it ' s been extremely clean
for the other systems.

HINES Bill Hines again. Would you clarify for me, I

understood you to say that the CANEX conference, which I
understood was a conference between Garneau and the experiments
some of the experimenters, and the presidential telephone call
was the same event?

LACEFIELD Okay, as that was explained to me. That's not
between the experimenters and Garneau. That was not scheduled to
be that.

HINES

What was it then. Can you tell me?

LACEFIELD And the phone call part of it has gone away,
certainly .

HINES Okay, well maybe I won't take up anymore time here,

but you're leaving me completely in the dark about what you are
talking about.

PA0 Okay, we'll try and sort it out for you a little

later, Bill. Okay, is that all from KSC? Okay, we'll come back
to Houston here for questions. Lee Dye.

LEE DYE - L.A. TIMES If they fixed the antenna ... the Ku-band
antenna. . .drive the pegs and what have you, does that then put it
out of service for the remainder of the mission or can you still

use i

LACEFIELD If we fix the antenna where we put the locking pins
in it, we can still put it out to do data tapes. Whether we do
that or not depends on how well SIR-B stows before the EVA. If
we have a problem stowing SIR-B, then we will probably leave it
stowed .

STS 41-G CHANGE-OF-SHI FT BRIEFING P 7 j 10/8/84 11:45 noon PAGE 13
PAO Mike Mechum

mpthiim So there is a possibility that if you get confidence

C as the Ku-band closure, that you could continue to gather
dlta even after the EVA. Is that a potential for being able to
gather data on Friday.

tapffteld That is a potential, and we have looked at pointing
£l£h the Ku when we have it pinned. We have acceptable pointing
^tUuoes And if S?R-B has^towed all right, we will go ahead
and do that.

PA0 Okay, Ellie Tesher, back here.

ELLIE TESHER - TORONTO STAR Could you tell J« «hat point a
private medical conference is requested by an astronaut and how
often has that happened before. And could you also tell me in
?he So?" of science acronyms, did I correctly hear you say the
party was doing all right?

LACEFFIELD The WCS is doing great. We haven't really had that
-- r ^ iV 1^j C ^ r e°SrtHe C ^a?r^^ r ?°^e t o has'o Ty been,
?? the« his been very many, it's only been a couple. They are
unusual .

PAO Okay, we'll take a couple more here in Houston and

then we'll wrap it up. Sheri

SHERI ARHETI - ABC NEWS Can you tell me if it turns out that
you get TDRS either late today or say tomorrow morning is there a
change of moving the EVA to Friday?

LACEFIELD No, we aren't discussing moving the EVA later
because that would post-poned the end of landing.

ARMETI Right, I was going to ask that

LACEFIELD And we are not considering that at all.

ARMETI And also, if say you get TDRS wor k inq in the next

few nours are you going to delay the crews sleep period or pre
sleep period.

LACEFFIELD We don't plan to.

4RMFTT And the press conference for tomorrow, if TDRS is

working, are we definitely going to get or if TDRS isn't working
Ire we going to get TV or is it just going to be audio?

LACEFFIELD I'm really not sure.

STS 41-G CHANGE-OF-SHIFT BRIEFING p7j 10/8/84 11:45 noon PAGE 14

ARMETI Steve, can you check on that.

PA0 Okay, right here and then Carlos

FRANK GREENWALT I think there is a gas experiment onboard
that's suppose to study the effects f cosmic radiation or
something on electronics. I assume this burst of cosmic
?aS!aaSn,?f it occurred, would be good for the experiment. Do
you have any sort of data?

LACEFIELD That data is recorded onboard, I believe. I can
tell you that the gas experiment was activated on time.

GREENWALT Would that thing be good... I'm looking for a silver
Unfng Sere... is that one good thing you can say for the cosmic
burst? Does it make a difference?

LACEFIELD I don't know.

GREENWALT Also, one other thing. I'm a little... you seem
awfully certain about landing either Saturday or whenever but is
?here some reason why you do not want to postpone the mission
there some J J b t gettin g the OMS pod fixed once its on

the' ground! Is that one more day going to make a difference,
is it completely out of the question to extend the mission?

LACEFIELD As far as our planning is concerned it would. .. it's
kind of out of the questioner .extending the ^siion We are
not considering extending the mission at all. And what I m
Worried about if I don't say that is you'll think we are off
t?Jing to extend it or what I'm trying to do is tell you very
positively we are looking for landing on Saturday either at the
Cape or Edwards.

GREENWALT There is no particular reason that you

LACEFIELD That's the time the mission is suppose to be over
and that's what we are shooting on doing.

pA0 Okay, Carlos, did you have another?

CARLOS Field, what have you had to set up in way of

communication stations or tracking syst because oft he T DRS
nroblem And if this is relatively short life problem, or lr it
tu?ns Tnto be a longer problem, what might you have to do.

LACEFIELD What we have done since we have the TDRS problem is
we hive gone back and negotiated with ERBS to take some of the
real-ime passes that they were suppose to be getting today. we
hive negotiated those and we have taken, I believe, taken 3 or 4
passes from them. It didn't put them in any kind of Problem.
They are in the middle of there burn, and they will be able to

STS 41-G CHANGE-OF-SHIFT BRIEFING p7j 10/8/84 11:45 noon PAGE 15

get their burn down. But we have taken some of their passes. We
probably have taken probably 4 sites. We have activated some
sites. We have activated New Hampshire so that we can pick up
some data on the higher inclination.

CARLOS The passes you are talking about, the ERBS passes

you are talking about, are in fact TDRS passes?

LACEDFIELD They were g stayed in passes. They were like we
took Ascension pass, we took a Bermuda pass, and we took a
Canburra pass.

PAO right back here.

You seem pretty confident that TDRS will come back
up. Has it been confirmed that it was just the memory that was
wiped out or is it anything more serious than that, do you know?

LACEFIELD I don't know if it's anything more serious than
that. And I think it will be a little while before we know if
its more serious than that.

Also, can SIR-B data only be dumped through TRDS.
It can't be dumped directly to ground stations? So the other
sites you just activated are for what.

LACEFIELD For so we can talk to the crew and get our normal
data down and our normal command capability up./

And is there any chance that we will get any more
television today.

LACEFIELD Probably not. We are shooting, I believe, if
everything goes okay with out water dumps and stuff, we are
shooting fo? a, I believe, an ORS transfer this morning real-time
TV event and that would be on rev 55 or so.

PA0 Rev 54 Mila... about 2:08 this afternoon according to

the TV people. On the question about the private medical
conferences earlier, John Cox said, over in the control center,
reports that we had it built into the flight plan as a standard
procedure up to flight 5 and after that he says we have not had
one since flight 5 . Okay, we'll call it a day here and thank
you very much.

END OF TAPE

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 1

PAO Well, good evening, we'll talk about mission 41-G

again with John Cox, off-going flight director, and John go ahead
and summarize.

COX Okay. Today was a pretty quiet day in the control

center, quiet from our sense as we didn't get a chance to talk to
the crew a whole lot with the TDRSS satellite out. But, it looks
like it's about back online and things are looking pretty good
there. So, we hope to be back in business probably within the
next hour or so. As far as the activities were concerned, we
accomplished the ORS transfers 4A and 4B. We did supply water
dumps, did a couple of them today, to get the tanks down co where
we like to have them. We did another, we did two waste dumps
today, also. The waste dumps did cut off on our new temperature
criteria and they looked like we were starting to make some
little small ice pellets as they came out, but the new criteria
stopped us from causing any ice buildup. So, it worked fine. We
just had to repeat the dump several times to finally get the
water down and that all worked super. We did try restarting the
topping of the back evaporator today. It did shut down, but it
did it in a different today which confirmed that we did have an
ice buildup in there. However, it looks like it's clearing. We
actually got a partial flush and that was part of the reason it
shut down on an undertemp. We're going to let it continue to sit
with high radiator, high Freon flowing hot, hotter, ur, Freon
flowing through it for awhile and that'll cause it to continue to
melt the ice, and then we'll do another start again tomorrow and
maybe a couple of them with a window space between them. SIR-B
performed their antenna stow test today and with about the same
results we had the other day. So, unless something comes up in
their area, probably EVA day will be the last day that they see
the data collection. Of course, they're open to go ahead and try
some more tests on the antenna. On the TDRSS pointing today,
apparently, there was some sort of a, a pointing upset with the
satellite that I don't think is understood by anybody at this
time. The satellite is back under control again and it's been
going through calibrations for the last orbit or so. And we're
told that we can expect to have it momentarily. I believe the
new time is a GMT of 0:100. We did also have a funny today. You
know, it's almost like SIM soup has been playing, if you've ever
watched one of our long SIM's that run for two or three days,
seems like everybody gets a little something and with the storms
in the area today, we were bringing up our backup power supply
for building 30 and somehow, we cross-connected or did something,
anyhow, the eventual thing was that our MCC bus B-l went down for
27 seconds. It's not clear that there's been any damage. It was
back up and everything working fine, but it almost seems that
SIM's soup has been working on this flight. Tomorrow, Pinky
Nelson and Jerry Ross are going into the water tank and try
working on the antenna procedure. Again, another team of folks
went over and looked at some other ideas with the antenna and it

STS 41-G CHANGE-OF-SHI FT BRIEFING 10/08/84 7:45 p.m. Page 2

looks like all of that coming to a good maturity. We think
that's looking pretty good. The arm is currently out in the EOIM
position for the evening. The ERBS is performed another one of
its burns and right now, based upon the propellant it has
onboard, it plans to arrive on station with slightly more than
half of all the RCS fuel that lifted off with, which is a
bunch. It's in really fine shape. And we had some SIR-B quick-
look pictures that came in today. The ones we saw were from
Montreal and New Hampshire areas and those looked awfully
impressive. I was quite impressed with those today and with that
I'll be happy to answer your questions.

PA 0 Okay, we'll start right here in front with Carlos

Byars, please give your name and affiliation.

BYARS Carlos Byars, Houston Chronicle. On the TDRS

problem first, John, your saying pointing problems. Word kept
circulating over here was that this was some sort of a cosmic ray
or particle hit that had disrupted the memory. You said a
pointing problem. Could you explain a little bit more just what
ya'll understand did happen and the effect?

COX Well, I don't think anybody does understand. I

heard some of those same words or whatnot, cosmic rays, all that
stuff. That is a typical thing that happens with satellites and
probably somebody just reacted with a comment to that that's seen
on lots of them. Nobody's identified what this problem was and I
don't know that they'll ever figure it out. There, you know,
somebody could tell them that's what it was they'd be happy to
know that that's the answer. But, they're still troubleshooting
it and haven't figured most the effort that they're doing right
now is just to get it back up and supportive for us.

BYARS They, basically, they lost control of it? Is that

what . . . ?

COX Some pointing problem, I don't know what the

control problem was or how to characterize it.

SELTZER Frank Seltzer, CNN. Two questions. One, what's

the temp in the cabin when you came off shift, since you're
running the higher Freon?

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/19/84 7:45 p.m. Page 3

cox we did some things today to help bring that down.

I think yesterday the daytime temps were running in the order ot
90 to 91. They were running about an hour before sleep tonight,
we had it down to about 86. We turned off some equipment and we
also reconfigured the Freon loop proportioning that we give to
the payloads. We went to the Freon loop configuration that we
would do for the 10.2 prebreathe and that seems to have brought
it down a few degrees and we expect it to go down a few more tor
sleep. So, it looks like cabin is cooling off a little t>it.

SELTZER Second question, real briefly, with the SIR-B. Are

the tapes filled up now? You haven't been able to dump all day
today. What's that do to SIR-B in terms of its data take and
then if you have to go ahead and during the EVA latch down or do
whatever you have to do to stow the SIR-B and it's out on Friday,
then, and won't take any data, what's that do to it, to its
overall mission, do you know?

COX Well, I'm sure it's not helping it any. Today,

other than the fact that we were in side Sun for awhile folks
evaluated some frost that occurred on the Orbiter during the
waste water dump this morning, they lost a little data there, but
the crew performed the tape change for them and they ve been
going on collecting data all day today. So, they lost something ,
I don't know exactly how much, during that time. They 11
probably lose some tonight because you won't have a crewman up m
the middle of the night changing tapes for them tonight and I
think they'll probably fill up the tapes that they're currently
on. So, there'll be some additional loss there. But, as long as
the satellite is back up and running, I think the hit that they
would see as result of today's activities is going to be
relatively small. As far as not being able to operate on the
last day of the flight, yeh, that's going to be a hit.

PAO Paul Recer.

RECER On the TDRS, we've been told there 've been cosmic

hits before and they get it back up within a few minutes,
initially, after it went down, we were told it would be within a
relatively short time and this time was extended again, and
aaain, and again. Ya'll opened new ground stations. It became,
one could conclude, based on all of this, that there was a
possibility, at least in your mind, that this thing may not come
back at all during this mission. Was this ever discussed, or was
this ever a fear?

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 4

COX No .

RECER No matter how small?

COX No place along the line, anyhow during any of my

shifts, was I ever concerned it wasn't coming back. It was just
a matter of when and we've, you know, we had the same type of
thing even hit us in the simulation. You're dealing with
computer systems and those type of things people can say, "Yeh, I
think I understand what the problem is, I'm going to go to fix
it, and it's only going to take me 20 minutes," and we end up
getting one-hour, two-hour, three-hour estimates all day long. I
don't have any idea, in detail, what happened to that satellite
today. I think it's typical though of any computer system. If
we'd lost the function in the building, I'd get estimates like
that and they'd keep on being up. The reason we brought the
other stations up was, if you look at the ground track for 57
degrees, you just plain old don't get much coverage and we were
still trying to share with ERBS, they were still using the GSTDN
sites, so trying not to just wipe them out with the very few
sites we did have, we went ahead and brought up some ocher
stations, just to provide the coverage.

RECER Okay, were you also given a series of indications

that it would be up momentarily or within the next rev, or the
next two revs?

COX I probably had, oh, maybe three different updates

of when they were going to be available and they were always a
little later.

RECER Okay, well when in that series, did ya'll decide to

bring up the other ground stations?

COX They were already brought up before my team even

came on shift. As soon as the satellite went out, they went
ahead and started bringing them up.

RECER Okay, what are the ground rules for bringing up an

additional ground station. I mean if you expect it to be out 20
minutes, do you bring it up, or...

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 5

COX No, but the experience we had TDRS , we've lost the

White Sands interface with the satellite before, not in this
fashion, but typically we get a one-hour estimate. If we don't
get a one-hour estimate back, then we start looking at what do we
need to cover. That's the typical way we work. We even work
that way in simulation. So, and the estimate, initially, was
going to be more than one hour, you just start looking for other
ways to get your coverage.

RECER So, that's a rule, if it's going to be longer than

one hour, you bring up the ground stations?

COX It's not written down as a rule, it's just a good

way to operate.

PAO Craig Covalt.

COVALT John, did you see anything on that second OMS pod

survey that was of interest. Where I'm coming from here is,
looking at it, it does look like you've got a fair amount of
stuff missing back there and chewed up. When you think of what
occurred to Vance's entry there with just the ice hit that took a
lesser area out, are you concerned you're going to get a big
repair job on that OMS pod now?

COX Well, there's some concern on the repair aspects of

it but when we developed the when we developed the "what if's" on
this one, I, the whole "what if" scenario was based upon the fact
that all the, took the worst case approach, and said, " Okay, all
the tile or all the frizzy is gone from that area and all I'm
looking at is charred RTV in there." And that's about as worst
case as you could expect it. And based upon that, they concluded
that they might get some minor damage to the epoxy graphite layer
in there, some elamination. And so that wouldn't change, even
based upon the pictures that we saw today. There happens to be a
very fortunate way that those, that was a transition piece that
was laid in between the newer tiles that were put on the front
and the aft frizzy that was delivered with the vehicle when it
originally came. That transition piece was just put on recently
and it happens that the tile that was put up in front is larger
and that's sort of like down in a valley in that area, a relative
valley, as far as the flow shape is concerned. We've also
carried instrumentation in that portion of the pods before,
thermocouples, and we know that on entries that fly, even a
higher feeding entry. In other words, what we do now is we stay
at 40 degrees alpha slightly longer than these other ones did,

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 6

where you would' ve exposed that part sooner when you're up in the
high eek regions. We've stayed 40 degrees beyond about the
14,000 ft/sec mark, we're down a couple more thousand more ft/sec
before we actually come over, which lowers the heat pulse to that
area. The worst case that they saw, I believe was on the order
of between 700 and 750 degrees. The RTV itself should be able to
handle on the order of about 500 and something degrees. So, if
you're talking about for a little bit of time, I'm going to be
slightly above the temperature that the RTV ought to be able to
handle. Now, how much damage will that cause, you know, it's
like I'm going to have a few seconds, a minute, whatever it is,
at a warmer temp and you can guess whatever you want about
that. They won't know actually until it lands on the ground,
what the repair job will be. If it stays very small and
localized, it may be a very easy repair fix, but if it gets a
little larger, then it might be more or there may be some sort of
an impact to that. But, that's what people are concerned about,
they don't know what the impact will be and what to do about it.

COVALT Quick follow on the landing issue and this is going

to be a question everyday between now and Friday, is the weather
situation, did you have an additional update today on the trend
for Kennedy?

COX Well, we went ahead and looked at tropical storm

Josephine out there and based upon the trends, right now, the
predictions, at least I received today on my shift, was that it
will probably start to, it's heading more in a westward
direction, it should start turning and heading north, clear the
Cape area, and have a clearing trend established by Friday and
looks like we could probably anticipate a landing on Saturday.
But, you know how much fun it is to predict tropical storms so...

(Laughter) We'll ask again tomorrow.

COX Right, you need to ask everyday.

GREENWALT Frank Greenwalt from the Daily News in Los
Angeles. I'm unsure now about how long you're going to be
collecting SIR-B data. I thought I heard you say they did the
antenna exercise.

COX We did a test today to see whether the folks

thought they might have found a flaw in the procedure the way we
were currently stowing, so they added an extra check for the crew

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7; 45 p.m. Page 7

to make to make sure that the interlea*. was really down and in a
loaded position down. There's actually some springs that work in
there as you're going down and a little ratcheting mechanism.
They wanted to make sure that the load direction was holding it
down before you started to close the outer leaf. So, the crew
went ahead and tried that today, and they still couldn't get the
microswitches to mate, which enable the latch drive mechanism.

GREENWALT Did I hear you say that you didn't expect any more
data collection until EVA, or are you talking about just the
antenna?

COX Oh, they're collecting data now. They're off and

running. That was just a test while we were off in the side Sun
attitude. This was a good time to go do the tests since they
weren't in an attitude they could take data with at the time, so
we went ahead and did the tests. We had uplinked the message the
day before and the crew had looked at it. The way we're thinking
right now, is when we do the EVA we'll want that antenna stowed,
because EVA happens to be one of the ways that we know we can
stow it in addition to the arm. Those are the only two bonifide
ways we currently carry on the books that we could stow it, is
one's with the arm, which as you know has its single point
failures that we've seen on previous flights, and the other is
EVA.

GREENWALT The antenna is now deployed again?

COX It's deployed and taking data.

GREENWALT And one other question, about the TDRS. My
understanding nobody knows what caused the failure.

COX Whatever the upset was, nobody knows what caused

it.

GREENWALT And I have a feeling that nobody is ever going to
know .

COX

That's a good possibility.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/03/84 7:45 p.m. Page 8

GREENWALT But, a possibility is nobody knows, it could be the
cosmic rays, could not, it's something that's happened before,
it's a good alternative.

COX It's a good thing to blame it on if you got nothing

else to blame it on.

( Laughter ) .

GREENWALT Thank you.

COX Get Mother Nature to get you one way or another.

PAO Mort Dean.

DEAN Mort Dean, CBS News. When you said it was a

pointing problem, does that translate into a loss of memory
problem, as well?

COX I have no idea. I don't know all the things they

have to do to recover a satellite. I know when Goddard had the
Solar Max satellite tumbling, they had a pointing problem and
they did a lot of things - they loaded memories to change
different control modes and whatnot, so, I don't know what all
they did, that really is none of our business.

DEAN If you don't get TDRS, is the EVA is jeopardy,

would you go ahead and do the EVA?

COX Oh, no, we'd still do the EVA. I know it would be

disappointing not to have all that nice live TV through that
whole period but as far as EVA is concerned, the TV is not
required.

DEAN And quickly, do you have any a kind of comfort

index or something like that in your rules and regulations. In
other words, if the temperature onboard in the cabin stays above
90 for a day, or two days, or two and a half days, do you decide
that this jeopardizes the health of the crew and do you decide
then to come back.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 9

COX Oh, we don't have a rule or anything, just got more

of a rule of thumb that if it is uncomfortable, you try to
correct it within reason. And, Crip has told us several times,
we've asked him about it, and we have a whole list of some more
things we can do to help you, they take away some of his nice-to-
have features, by powering down equipment that's putting heat
into the cabin. So, you know, one thing we haven't done at all
is just deployed the radiators. We could obviously go do that,
it happens that one of the radiators blocks some large format
camera data, so we'd prefer not to do that. It also makes it a
little bit tougher to look with the arm, but we could do that.
One of the things we could turn off is one of the computers, we
have redundant computers in there. There's lots of little tricks
like that, but they seem to say that's alright, and we tried some
other things that were non-impact equipment, totally, that we did
turn off today and it has brought the temperature down some.

PA0 Let me get to the back of the room and I'll come

get you guys again. Henry Cooper in the orange shirt back there.

COOPER Henry Cooper with the New Yorker. Two questions.

First of all, when you talk about a pointing problem with the
TDRS, do you mean a problem pointing some antenna on the TDRS
do you mean that the whole TDRS is out of attitude?

or

COX Well, we had lost the interface both ways, so I

would suspect that's more of an attitude problem. I have zero
details on . . .

COOPER It could have been the whole TDRS satellite, which

was out of attitude?

COX Yeh .

COOPER Yeh. And the other question is, how did the lack

of the TDRS satellite during the day effect your operations in
the mission control room.

COX

Well, we didn't talk to the crew as much.

COOPER

Did that bother you? Were you.... did you miss it?

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 10

cox With the extra sites that we brought up, you know I

was talking to the CAPCOM there for awhile. We Probably act ually
did not talk a whole lot less or more. We :ust didn t look at
the data as often. Because normally we don't spend all the time
chatting with the crew anyhow. So, we figured we probably talked
about the same, all the messages that we, processed through the
day, we didn't have any trouble getting them up, so I don t think
we were ever pinched for needing to have air-to-ground time to
talk with them. It was just a kind of a different way of doing
things. It's, when you fly in a low Earth orbit and you re
flvinq at 57 degrees, you don't have good coverage, these sites
that make up the network are pretty much set up for, the ones
that we normally use are set up for a 28-degree inclination and
we're kind of used to operating at about 160 miles where we put
most satellites out, so that gives you quite a bit more coverage
than what we have in the current configuration.

PA0 Okay, we'll take Paul and go back up front. Paul

first, then we'll go to the Cape.

RECER Just a quickie. What was the max temperture? We

heard 90 then we heard 93 and also the maximum humidity?

COX I have no idea what the humidity was, I

check. Somebody said 37 percent today, maybe that was
would be surprised if it weren't higher than that.

didn' t
it, I

RECER

And the maximum temperature?

Cox The max that I saw was 91. If you said somebody

reported 93, that could 've happened. You'd have to keep watching
it to see it.

RECER

Did you all figure a comfort index on that?

Cox Well, we've asked the crew again, you know, we

didn't have any problem and we're down to 86 when I left so...

RECER

Well, I mean, there's a formula for a comfort now.

Cox Didn't compute one. We asked for a personal

evaluation because I believe a comfort index varies.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 11

MEDIA You could ask for the misery index.

(Laughter )

MEDIA On the ground stations, you brought up a New

Hampshire station today, that I was never familiar with. That's
a DOD station, correct?

COX That's right.

MEDIA Did you bring any other DOD stations up that you've

never had up routinely, or actually why don't you just say what
stations you brought up and add it to the...

cox Let's see because of ERBS and sharing stations, the

sites that were outside of the TDRS umbrella, Guam and Hawaii,
there's DOD sites that we can use both there and I don't remember
their ...I'm still talking about Hawaii and Guam. We have back-
up ways to talk at those sites through a DOD site. And then we
brought up Vandenberg, out on the west coast, because we had,
again, another conflict with ERBS for Goldstone, so we went ahead
and let them keep Goldstone and we took the Vandenberg site. And
then, New Hampshire is the other one. And then IOS.

MEDIA Indian Ocean. You know where in New Hampshire, the

New Hampshire station is?

PAO In New Bosten.

MEDIA Near Bosten? Austin, New Hampshire.

PAO New Bosten.

MEDIA New Bosten, okay. A second thing here, it's kind

of a general question. Would it be accurate to characterize this
as really involving the mission, really involving extensive
dynamic replanning throughout the flight? It strikes me that
way. And also, do you think that it has involved a pretty heavy
management load on Crip, airbourne with, considering the total
number of people he has and getting the replanning squared away
up there?

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 12

cox Well, surprisingly, it's gone very smooth as far as

planning is concerned. Mostly, we're just moving days around and
that's pretty easy to accommodate and most all the activities
that are in-cabin activities like the ORS transf and those
things that the crew actually is involved with, those are ea.y to
move around because those don't have any time constraints on
them. As far as the ground track is concerned, we're pretty much
flying with the, since we're on the same ground track that we
started with and we're looking at the large format camera data
takes and the SIR-B's whatnot as you go on through the flight,
the crew is basically flying to the original attitude timeline
with the modifications to let the Orbiter porpoise up and point
at the Ku-band at the satellite to do the data recorder dumps and
then back on down to data take flown. So, as far as that, the
CAP is built in two pieces, if you notice, once there s a crew
activity in-cabin timeline and then there's this attitude
timeline that's in the back that you just run on down and do this
attitude for this time and that attitude for that and it just
roll, pages and pages of entries like that. That part's P^tty
much staying the same except with the modifications we have to do
for the data dumps and there's priority replannig going on
within the oayload community that was expected, I mean that
always happens. So, there's different trades that are going on
through there, but that's no different than we expected to see.

PA0 We'll go to the Cape now for questions and as they

reconfigure the lines, the control center reports the humidity in
the cabin is 56 percent. 5-6. We're coming to you for questions
KSC.

MCKINNIS-RAY Yeh, Rick McKinnis-Ray at CBC Radio News. Can you
tell me about the CANEX news conference scheduled for day 7
rescheduled to today and then dropped? What was that supposed to
have been? Will it be rescheduled? If not, why not?

cox The news conference is scheduled for tomorrow, what

rev 68?

PAO That's right.

COX

And I believe that's the same conference that was

going to be on flight day 7

MCKINNIS-RAY This is the Canadian experiment now. CANEX
conference as opposed to the inflight...

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 13

COX We've carried it in the CAP, as a CANEX news

conference, but some of the participants may have changed or
whatnot but basically the general intent of that conference was a
20 or 30 minute discussion with the crew from several different
sites, and I believe that's what you're still seeing scheduled
for tomorrow. I think we've had some of the participants change,
but Brian may know more about that than I...

PAO Well, I think the way to characterize it is there's

a press conference, inflight press conference, tomorrow
morning. What's been previously carried as a CANEX conference
has always been a talk between two heads of state and the crew
and for various scheduling reasons, the heads of state have
dropped out and that's gone away and so we're left now with a
crew press conference and that's where the confusion. The CANEX
term is probably unfortunate, it's not simply devoted to the
Canadian experiment.

MCKINNIS-RAY A last question, sir. What did our Canadian
astronaut do today? What will he do tomorrow?

COX He was pretty busy today. Let's see if I brought

the report over with me. I think, he reported he did virtually
everything that was on his CAP today and maybe some extras.
There was some data takes that he wasn't all that pleased with it
didn't seem and he was going to go back and probably work on them
some more, but there was two or three SPEAM objectives met, some
OGLOW, he did the SASE taste tests. I'm just trying to recall
off the top of my head, there were several of them. He had a
whole list of things he read down today. It sounded like he had
been quite busy.

MCKINNIS-RAY What about tomorrow?

COX Oh, he took pictures of the aclimex while we had

the arm out the window to do nozzle surveys, that gives him an
opportunity to get pictures, gain pictures of those samples, more
so tnan he would have been able to pick up in the normal flight
plan because we would've; left the arm out virtually the entire
time and then brought it down right at the end, let him snap
pictures and then stow it. Everytime we bring the arm down, take
a look at a water dump, the samples are right outside the window,
and he can just get the camera out and start taking pictures, so
he's documenting whatever gradual changes are occurring with
those samples he's getting a more refined grading of that change.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 14

MCKINNIS-RAY Finally, sir, did he say anything more beyond his
normal report today?

COX He wished his wife a happy anniversary.

MCKINNIS-RAY Oh, what number is that?

COX 11.

PAO 11.

COX 11, I'm told.

MCKINNIS-RAY Thank you.

KSC That's all from KSC.

PAO Okay, back here, we'll take Frank Seltzer here.

SELTZER One thing. How much has it helped you to have Crip

up there as the commander being so familiar with the Orbiter? It
seems throughout the day Crip has almost been ahead of mission
control at some points.

COX Seems like that in lots of simulations with him,

too. It's always good to have an experienced crewman onboard.
We've learned that quite a long time ago. That's the reason that
you try to fly some people over again everytime you put a crew
together. I think Crip was just anticipating, knowing that we
had the poor coverage to try to be there, because he knows that
we only get a little bit of time to talk, he can't drag it out
over a long TDRS pass. So, I think today, he was just trying to
keep up and be there when we were.

PAO Third row, white shirt, Dan Molina.

MOLINA Dan Molina, NBC. New that you know that you're not

going to get anymore SIR-B data after the EVA, because you're

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 15

going to stow the antenna and lock it down, do I understand that
right?

cox The SIR-B people, I must point out, haven't given

up. They may come in with another test. You know that, it's
still open for discussion, if they come in and prove that they
can latch reliably than that's fine, but the test that they
thought . . .

MOLINA You're willing to try that if they give you a

proposal for trying it again, you're willing...

COX We'll gc ahead and try any more tests that they

want. They're welcome to deploy and stow that antenna as many
times as they want to.

MOLINA Well, my question was going to be, if that was to

be the case, that you had to not get any more SIR-B data after
the EVA, would you have then a feel for how much of the total
objectives of SIR-B would be accomplished? Maybe it's not
relevant at this point, if you think it might be latched. Do you
seriously think that they might come up with a solution to it.

COX Oh, there's a fair chance. There's a fair

chance. I don't have a real good guess, you know they gave us
some numbers back before we had the Ku-band interface back and
they were running about six percent or something like that and
then they were revising their estimates when we thought that we
could start to get some coverage. It might be 25 percent and
then when we started getting everything they were trying to get
each day, like yesterday, and we would've had today had we not
been out of attitude a couple of orbits. They began to start
racking the numbers back up again, so, I think today, you
probably guess that thoy were probably 60 percent or so for
today's activities. When you add all of those things up over the
days and give them a zero for the last day, maybe they're going
to average 40 percent or something, I have no idea. But, it
would be in that ballpark.

MOLINA Quick question of personal interest. Do you know

if archeology is still a fairly high priority with the SIR-B
guys?

STS 41-6 CHANGE-QF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 16

COX Oh, I'm sure it probably is. I think they're still

after the same prime targets they were after before.

MOLINA And archeology has been a fairly high percentage of

the priorities.

COX Hmm. And I think they're basically after those

same targets and now that we're in a mode where we can acquire,
they're going for them.

PAO And behind hir...

MEDIA To pick up on an earlier question, can you think ok

any examples, John, in which Crip was ahead of mission control.

COX I know just as a team, we gave them the option to

go ahead and do that SIR-B test, for example, and the next time
we had coverage with them, here came the report down. Kathy had
done that part of the test. We had asked them to off and do
during that same period a supply water dump and they were ready
with all the information about how that had gone. We had given
them a new attitude to try to coldsoak the radiators during that
same time and they were also trying to do an ORS transfer. They
just kept right on plugging on through that and flipped over, got
to the new attitude, and by the time we hit Guam AOS, they were
ready for the procedure we'd read up one of the earlier sites to
get on with the flash evaporator test. So, I don't know whether
you call it so much getting ahead, but when the AOS call came in
they were there ready to go.

PAO Yes sir, your name please, right here.

HAZEL Harold Hasel with CBS News. Just a quick

clarification. The 40 percent number, is that on coverage or 40
percent . . .

COX Don't quote me on the numbers, I'm just, he said

from my prospective, from where I'm seeing it. If you want some
good numbers, you need to get them from the SIR-B folks. That
would be based on my opinion on how many targets we're able to
hit and it would have nothing to do with how many minutes of
actual data take time.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 17

PAO There's the SIR-B science conference being worked

up for sometime tomorrow, I understand, and there will be a
principle investigator here. Henry, did we get all your
questions? Come up here and get Paul Recer for me.

RECER Have you in the past or will you in the morning

send up advice from the flight surgeon to modify their diet,
their exercise schedule, or their fluid intake as a result of the
heat in the cabin?

COX Haven't had a single input from the surgeon on that

subject. He believes the crew when they call down and say that
it's fine.

PAO I was told the science conference is at 1 p.m. in

SIR-B and LFC. Any more questions, right over here.

GREENWALT Frank Greenwalt from the Da'ly News in Los Angeles,

would you review again how you plan to close the SIR-B antenna?
Do you plan to use pyros, or can the arm, or in event the day
before landing never...

COX Assuming they don't come up with a good way to

latch it, is what your after I guess. It is a piece of cake for
a crewman that's on station out there to just go (pssh) and push
it down during the EVA, if it isn't latched, so that the
microswitches make and they'll just drive the latch shut. That's
probably the easiest way to do it. So, I, there's no point in
going ahead and exercising the pyro stow unless someone just
wants to evaluate it and see if it works.

GREENWALT So, if it's not fixed some other way, some other

solution, there's a good chance that it'll be done during the
EVA?

COX Yeh, they'll try to stow it prior to the EVA and no

matter what the situation is, because we want to be in that
configuration in case the Ku-band doesn't stow nicely for us and
we have to go to some of the back-up ways to stow it. So, it'll
be there and then if we need to latch it, if they haven't come up
with another way to take care of that problem. I suspect the
easiest thing would be to just push it down.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/08/84 7:45 p.m. Page 18

GREENWALT Well, I'm still unclear, you said try and stow it
before, you just mean using the standard way, you don t plan to
use the arm or anything like that? Try to stow it the standard
way, if that doesn't work, then EVA or would you use the arm.

COX We haven't made any decision about that right

now. I'm just taking off the top of my head. The one that s
least likely to do any damage to them is probably ]ust the
crewman pushing down on it a little bit. You don't have any
feedback with that arm when you're pushing on it and you wouldn t
want to intentionally or accidentally damage it. So, that would
probably be the easiest way to do it.

PAO Further questions? Good night then.

END OF TAPE

STS 41-G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 1

PAO This is Houston Press Center. We'll switch now to the USIA
studios in Washington for questions from Australia and possibly
Indosia. This is Houston Press Center. How do you read USIA?
This is Houston Press Center. We're standing by to switch now to
USIA, This is Houston Press Center again. Do you read us USIA
studio? Okay. This is the Houston Press Center Challenger.
We're ready for questions now from Houston.

SPACECRAFT Okay, Houston, we're standing by. They've been
tough so far.

PAO Okay. Okay, we're ready now for questions from Houston.
If I don't identify you by name and affiliation please do so.
Paul Recer.

PAUL RECER (Associated Press) Based on the television views
that we have seen of you people in your space cabin, you resemble
sometimes a can of anchovies. I'm wondering for Bob Crippen when
you return are you going to really recommend that seven
crewmembers again are flown aboard the Space Shuttle?

CRIPPEN That's a very tough question and one that I've
considered a lot prior to taking this mission. I guess the
result is is that I have found that if people are properly
disciplined and are at least with the kinds of tasks that we have
that we can operate seven people in the Shuttle.

PHILIPPE GARNEAU (Telemedia Radio Network) (Translation) This
is your kid brother Marc. I will now ask my question in
French. Marc, we have seen the results of the space vision
system. They're marvellous. Now, tell me in your own words,
what were your personal impressions of the launch.

MARC GARNEAU The launch was I had thought it would be. There
was a lot of noise, a lot of vibration, and my heart doubtless
was beating very quickly. It was an extraordinary experience and
naturally it lasted about eight minutes before we reached zero-
gravity. During those moments, I was a little bit afraid but in
fact it went very well and as you can see we are all having fun
here .

PHILLIPE GARNEAU Now in English: Marc, we've seen the space
vision results of ERBS. They're wonderful. Could you share with
me your feelings about the take-off in English?

MARC GARNEAU Well, it was everything I expected it to be and
more. This tremendous vibration and the noise and just being
enveloped by the whole experience and of course it was changing
during the course of the eight minutes until we got up there. It
is an incredible experience, just upmost fantastic short trip
I've ever taken.

STS 41-G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 2

BUDDY LUMAN (UPI) This is for Commander Crippen. You are
unable to land in Florida on your last two Shuttle flights. How
important do you think a Florida landing is this time and what do
you think your chances are?

BOB CRIPPEN Well, I think that the landing in Florida cuts
about 5 days or 5 to 7 days off the turn-around schedule for the
next flight which is scheduled for December the next flight on
the Challenger, and that's fairly significant to the people at
KSC. However, I believe if weather or something prevents us from
doing it I believe that they can recupe from that. We'll make an
attempt at it. The weather's good we'll believe we'll get in
there. If it's not, we probably won't. And I wouldn't speculate
on the odds.

MORTON DEAN (CBS) To Bob Crippen, Bob how difficult are the
scullaging has it been for you to deal with a mission that has
had so many troubles - problems?

CRIPPEN Which mission was that Morton?

MORTON DEAN My follow up is this mission.

CRIPPEN Okay, Morton. Yes, we've had some problems. I think
they have probably been more tough for the ground to deal with.
The problem we ran into with the KU antenna I know is certainly
given the SIR-B folks some problems trying to get all their
data. I believe that Mission Control in Houston has done a
marvelous job than it normally does in coming up with work-
arounds allow us to do that. I think that's been the general
tenoir of the way we do business. If things don't work out well
we'll make the best of what we have. I believe we're getting
good data for them. We're having a little problem with our
FES. I think that we got that under control now and as far as
we're concerned things are running a little fairly smoothly.

MARK SIKSTROM (CTV) This one is for Marc Garneau. Marc,
you're rather busy up there 8 hours a day. You've been
conducting experiments and another 8 hours if your lucky you're
sleeping, are you getting much time just to gaze out the window
and wonder at the spendor of it all?

MARC GARNEAU Yes, actually I'm getting all the time I can. In
fact everytime we go over Canada I'm generally stuck at the
window having a look out there. I haven't been able to see it
all because of some clouds but certainly I'm getting my share of
the time at the window and it's absolutely fantastic.

MIKE SOLFER (Cable News Network) This is for Kathy and Dave on
the EVA. Are you confident about the maneuver you going to be
out doing with the KU band antenna? Have you rehearsed that

STS 41-G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 3

enough? Do you feel confident about it going through it in your
minds several times?

DAVE LEESTMA Well I can't say thct we've rehearsed it because
we aren't exactly sure what we're going to be doing yet. But
we're confident that we can get out on the KU band and position
it. And that will be just another one of the functions that
we'll do while we're out there.

MIKE SOLFER Follow up for Kathy. If the launch was worth three
E tickets, what do you think your walk is going to be like?

KATHY SULLIVAN Well, maybe I'll tell you when I get back down,
but I've got about five more in my pocket.

REBECCA CHASE (ABC) This is for Commander Crippen and Sally
Ride. Could you compare this mission with the other missions
that you've been on comparing the problems and the crowded
conditions and the heat as well as the accomplishments of what
you think you're doing up there.

SALLY RIDE Well the last mission that I was on with Crip was
the a great mission and we really didn't have many problems and
we had a great time the whole time we were up there. This
mission I guess, any spaceflight is a great spaceflight and we're
having an awful lot of fun. We've had a few more problems but so
far we've been pretty successful in all the things that we've
been trying to do. We got the ERBS spacecraft deployed on flight
day 1 although that a little bit of a struggle but it made us a
little more happy when we got it out there and I think that the
crowded conditions is more crowded with seven people than it was
with five but everybody has b<?en pretty good about trying to stay
out of everybody elses way and it's really working pretty well.
And as far as the heat goes, we're all from Houston so it's
nothing that we're not used to,

MIKE MATR1M { NET News ) For Paul Scully-Power. You're mission
up here is to look out the window and observe the oceans. Can
you tell us what you're learning about the ocean wave pattern.

PAUL SCULLY-POWER Sure. Once of the things that's come on to
us is that we're seeing a lot more dynamics in the ocean than we
ever believed was present. For example, right through the
Mediterrean there's a whole series of spiral eddies which have
never been recorded in the (garble) before. So I think the
advantage of coming to space to look at this is to pretty hard to
us the fact that the eddy or the (garble) dynamics is far more
complicated than we previously expected.

MATRIM But what exactly are you seeing up there? Have you
observed eddies up there?

STS 41-G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 4

SCULLY-POWER Yes. When you look down from this field of view
you can easily see not anyone eddy but a whole series of them
stretching right down to the Mediteranean , for example.

REAL D' AMOURS (Radio Canada Television) I'm going to ask this
question in French for Marc Garneau. (translation) Marc, right
now you're flying over Canada. What impression do you get from
going around the world in 90 minutes and especially what is your
strongest impression of this flight?

GARNEAU Well, the earth obviously goes by very quickly under
us. It only takes a few seconds to fly over and in fact we're
only over Canada for a total of 20 minutes at most. So things
happen very quickly but the view is absolutely extroaordinary ,
there's nothing to compare it to and I really regret not having
had much visibility over Canada because of the clouds. But, in
fact, I'm very proud of being a Canadian, of seeing my country
from this incredibly fantastic view. One realizes that one is
very lucky co be Canadian and to have as beautiful and vast
country as ours is.

I'll direct this question toward Sally Ride. Sally one of the
most important problems you've had on this mission has been your
ability to transmit scientific data back to earth. Most recently
though the loss of the communications satellite. My question is
as a scientist in space do you find the use of that time on that
satellite at this time appropriate for a press conference when
you could be using the same time to transmit scientific data?

RIDE That's a very good question and I'm sure there are a lot
of people asking that. We we're asking that ourselves and
(garble). It's important for you people to see how we live up
here and what we're doing and we're happy to give you a chance to
see how well we operate up here. I'm sure that there is some
ways to find a better way to use this time though.

JOHN GETTER (KHOU Television) For the EVA'ers, now that you've
had time to learn first hand what space travel is about, how it
feels, I'd like for you to share with us a little bit of your
vitual feelings about the space walk and the additional work that
we've been watching being rehearsed on the ground this morning
and I guess will be passed up to you a little later to day.

SULLIVAN Well, John, Dave and I as you know have spent quite a
lot of time training for the EVA tasks that we have on (garble)
in the water tank at Houston, and we've had a cursory look many
months ago at the kind of job generally that we expected to be
doing on the KU band. (Garble) seeing those procedures I
probably shouldn't comment anymore detail than that but I'd
repeat Dave's comments. Neither of us have any doubts that we'll
be able to get out there and get out the KU band antenna and
probably get it back in the appropriate position to lock the pins

STS 41-G INFLIGHT CREW PRESS CONF p9 j 10:37 AM 10/09/84 PAGE 5

and bring it back inboard. It's not something that should be
very difficult and we'll just look at the procedure and put it in
work .

JOHN GETTER So now that you're there it feels no different than
it did going into the WETF?

SULLIVAN If the WETF had only been this easy and this much fun.

DAVE JACKSON (Time Magazine) This question is for Paul Scully-
Power or maybe Commander Crippen. As you all may know there's a
gal named Josephine swishing her skirts a bit off the coast of
Florida. Nobody has a better view of that than you do. Can you
give us an inside scoop on whether it looks like its going to be
doing?

SCULLY-POWER Yes, we still have the formation of that yesterday
and we're looking fuller than (garble) from now to actually go
right over it and photograph it.

DAVE JACKSON Any idea about what direction it's likely to be
heading and is there any concern on the part of the crew?

CRIPPEN No, we certainly haven't been coming over that many
times such that we could track it. You have - the satellites
that we have weather satellites could do a much better job than
that. We can and know I guess there's no (garble) worry about
it, we're clear up here.

EVE SAVORY {CBC Television) I have a question for Marc
Garneau. Marc, this is Eve Savory and we all think you are
having a wonderful time but we know you have an introspective
side to your personality. Can you tell us what it is about this
ent-'.re experience that has perhaps most moved you?

MARC GARNEAU I won't tell you what we've just been talking
about. Probably the most moving thing for me has to be (garble)
When you look out down at your own planet and see intimently all
the incredible pictures of (garble) and power sub continents and
sea's an absolutely incredible site. You begin to appreciate
what the world is really like and I've had a few chances to see
some of these places and it's been very moving.

CRAIG COVALT (Aviation Week) I'd like to ask John and Dave
since they haven't been brought in yet here on the questions to
take a minute to describe some of the 3 dimensional aspects of
viewing Earth from space - to describe some terrain views that
really stand out in that third dimension perspective that
something you can't really bring back on film.

LEETSMA Craig, that is a difficult question but obviously up
here in space you can see things more clearly in that third

STS 41-G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 6

dimension. Some of the kinds we do with that pothius visibility
we have up is taking stereo photographs of the Earth as we move
along in two or three second intervals so that when we get back
to Earth we can take those stereos pairs and set them side by
side and by viewing them in a proper perspective you can see that
the photography in the terrain in a much better way that you
could ever do it in any other situation. And Marc had (garble)
earlier to the fact that you could see whole subcontinents and we
had a beautiful pass over France and Europe. This morning we
could see the total countries of France, Spain, Portugal, and
Strait of Gilbralter and most of the mediteranean all in one aft
viewing out uhe aft window and it was just magnificent and
something you can't describe.

JOHN MCBRIDE Actually we had some marvously opportunities, some
very, very sure passes over the middle east, down the Red sea and
the north east corner of Africa, it's spectacular. Also had some
spectacular views of the Arroral Australia the southern lights.
And they have been just outstanding the last couple of days.

CARY OBRIEN {Travel Australia) My question not surprisingly is
directed to Paul Scully-Power. Paul, you have been involved very
closely in the briefing and debriefings of many previous
shuttle's. Despite all of that has it still turned out to be
something far bigger than you could possibly anticipate and what
has been the piticals of what you have seen?

SCULLY-POWER Yes, it has been set out more than I expected. If
the want the (garble) I think the pitical is the ability to
integrate all that's gone before and to put it together in a vast
perspective and to try and make sense of it. I think that's been
an outstanding good sted fairly (garble) get back to pass on to
future crews.

OBRIEN As a follow up, Paul, Australia would understand for
understandably pragnetic reason for you coming a United States
citizen. Even so being in space now, do you also think of
yourself personally as being the first Australian in space?

SCULLY-POWER Well, just like the Polish-American, Italian-
American's I think of myself as an Australian-American.

SUSAN STARNES (KPRC) For Sally Ride or Kathy, please tell us a
little bit about the negotiations that must go on every night
when its time to go to sleep. Where do you guys hang out and
some of the things that might be related to personal hygiene
habits aboard the Shuttle.

SULLIVAN Well, hanging out, hang out is not exactly the right
words Susan, but Sally is showing you where she is camped out a
couple of free suiting nights. I spent the first night in
there. I spent the last couple of nights floating almost free on

STS 41-G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 7

the aft flight. I hooked a tether around my wrist and switched
hooked it off down near the deck so that I wouldn't hit any
panels with my feet but you don't float very rapidly. You just
sort of move gently around in the aircons. And other folks have
elected to attach themselves to sleep restraints, generally to
the walls rather than the floors and Marc has recently been seen
just kind of floating through the middeck at will, all night
long. Hanging around doesn't work. Hygiene wise I do a lot of
backpacking on (garble) and I think the conditions here are very
similar. Everybody just kind of gets through the'.r morning
routines and their evening routines. We have little tips of
centered soaps and whatnots that you would imagine and it's all
pretty straight forward.

DAN DUGAS (Broadcast News Radio) Question for Marc. Before
you left you said you had some thought to give to your future
that you have been in the armed forces for awhile and you'd had
to consider a commitment to space. Do you have any doubts now as
to what you want to do?

MARC GARNEAU Well, to tell you the truth I haven't been
thinking much into the future for the last seven or eight
months. Basically I have been trying to scramble to get myself
ready for the mission that we're on right now and that's really
absorbed me completely so I don't think I really thought about my
future past the fifth of October when we launched. Obviously
this is a very worthwhile endeavor and something to seriously
consider for the future but I've had a good career in the Navy so
far too so I really haven't made up my mind.

JULIET ONEILL (Canadian Press) High Marc, it's Juliet
O'Neill. Can you tell us what you most like to tell Canadians
about your voyage so far?

MARC GARNEAU I think I would like to tell them that this trip
into space for me has turned out to more than every I could have
hoped for. It's a great honor for me to represent Canada in
space and to work with an incredible crew that you see all around
me. I feel that even though I've gotten to known them in the
last two months that we've learned to know each other very well
and to make the most of the situation and it's turning out to be
a fantastic trip. There's lot of work to do but everybody is
cooperating and we're getting it done but.

JULIET ONEILL In a follow up can I just ask you (garble)
waiting for you to say something for the last three and a half
days and we know you're not shy. We're just wondering what's up.

MARC GARNEAU I'm sorry I didn't catch you question.

STS 41 -G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 8

JULIET ONEILL We're wondering if there are any constraints on
your messages to Earth. You haven't said much in your first
three days and we know you're not shy.

MARC GARNEAU Oh, I'm just trying to keep it short because from
my naval background I know it's not a good thing to keep babbling
on but these experiments are going very well. We've accomplished
a lot, there's still quite a bit more to do but I think that I
would describe things as being right on schedule and getting some
good results.

PAO Okay, we'll take one final question from Houston, then
switch to USI again, hopefully. Carlos Byats, Houston Chronicle.

CARLOS BYARS (Houston Chronicle) Crip, I'd like to get your
impressions of how the Shuttle is flying in particular how easily
or how difficult the maneuvers have been to line up your KU-band
antennas with peters.

CRIPPEN Carlos, as far as I'm concerned the Challenger is again
proving she's a marvelous ship. They had a couple of problems
but I don't think they were anything very big from our
standpoint. The one with the FES and the other one with the KU
band so she's still a marvelous ship and done a good job for us
and we'll see it through the mission well with the lady.
Regarding the maneuvers, that's just a matter of for us, putting
the numbers into the computer and telling the computer to go do
it. It's rather a diligent task so we have to watch over quite a
bit very similar but John Young on the spacelab mission a couple
of times we had made my errors, none of them significant, but
she's doing a good job and we believe this little trick that they
came up with, pointing the KU band at the TDRSS using the vehicle
was a marvelous idea that the mocker once again came through
with.

PAO This is Houston Press Center. We're switching again to
USIA studios in Washington. Challenger, Challenger ths is
Houston Press Center again. We've taken the signal ba k from
USIA. We'll take further questions in Houston. Steven Goldvein,
KTRK Television. Can we get a mike on Steven Goldvein, KTRK
Television .

STEVEN GOLDVEIN (KTRK Television) For John McBride, I was just
noticing that David Leetsma was doing a little exercising on his
own and on the deck there, I know John, that you like to play
handball a lot to keep in shape. What about physical fitness up
there in space with so many people?

JOHN MCBRIDE Yes, we try to set aside a little time everyday,
Steve. Everybody gets their exercise and the primary way of
doing that is the treadmill you see Dave. And Kathy and Sally
arched around here. We can set up the handle and pick it up on

STS 41-G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 9

there and strap ourselves to it with some tension ropes, set the
tension for whatever you want and run one or two or three miles
or however long you want to do it on there with the tension
holding you on the treadmill. And its gives you pretty good
exercise with all the muscles that you do not utilize while
you're up here in the deorb gravity.

JEAN-MARC CARPENTIER (Radio-Canada Radio) And I will ask my
question in french to Marc Garneau. (Translation) Marc, could
you talk to us about the results of the scientific experiments so
far and, in particular, of the program in space physiology.

MARC GARNEAU (translation). The experiments are going very well
up to now. We observed the shuttle's glow, we have also used the
sunphotometer on several occasions with most interesting
results. As well, as you mentioned, I'm continuing to carry on
the space adaptation syndrome experiments and things are going
very well there. As for the space vision system experiment, we
used the shuttle cameras during day one during the deployment of
the ERBS satellite but we will continue with other experiments in
which I will use the cameras, probably today or tomorrow, to try
to video record different areas of the shuttle.

JEAN-MARC CARPENTIER (translation) Thank you.

DOUG ROSS (KPRC Radio) For Commander Crippen, you've lost some
insulation back on the oms pods and what is your level of concern
for - as far as you can tell, how much have you lost and in the
thought of sending one of EVA'ers back there for a closer look?

CRIPPEN Doug, you probably saw the TV we sent down. We can get
a good look with that TV as anybody can. I think we proved to
all you people back on STS-1 that area of the pod has that kind
of insulation on it primarily for a turnaround that we use
capabilities for it keeping the vehicle down is no problem
whatsoever. (garble) says the folks at KSC are going to have to
do a little bit more work on the old spot before they get ready
to fly again, that's all.

FRANK SELSER (Cable News Network) This is for Kathy. On the
SIR-B antennas there's been the problem with getting it latched
again and last night John Cox said that you are still having
problems with getting it to stow properly. Have you looked at it
today? Does it look like you're going to be able to stow it or
during EVA will you have to close it do you think?

SULLIVAN We have not had a chance to look at it any closer
today. The problem with that Frank is that we have to of course
interrupt data takes to do so we're going on what we saw on the
two previous stow cycles and we feel pretty confident that there
is just a very small (garble) problem that prevents the outer

STS 41-G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 10

leak from closing completely and that terms prevents the latches
from driving home and holding it shut. As we managed to do
earlier in (garble) we're certainly able to do again later.
We'll just push down on it with the RMS and close that gap and
let the latches drive.

PAO Okay, we'll take one last question here and try the switch
again to USI. Mike Matrim (Ganet)

MIKE MATRIM (Ganet) For Dave Leetsma. Could you tell us,
apparently you're getting good success on your fuel transfers.
Can you tell us whether the kinds of temperature concerns you had
look good so that satellite refueling should be successful?

DAVE LEETSMA Yes, as a matter of fact more transfers have gone
v«,y very well and we have shown, the data has shown so far that
we ace getting a little bit more heat transfer that was expected
which is good news for that satellite refueling so.

PAO This is Houston Press Center. We're switching again to
USIA.

We'll make another stab at sweeping all our (garble) centers
today, Challenger, and Jocarter and Sydney and Commander Crippen,
I just wish to welcome you to the world net portion of your live
press conference today. To save time I won't ask to introduce
the other members of your crew. They are now familiar and so
we'll go directly to Sydney for our first question.

from Sydney Australia and from viewer (garble) this helicopter
71 (garble) across the country. The first question to you Bob
Crippen. This is your fourth mission. I wonder whether they get
any easier and to they become rather routine after all this time
in space.

CRIPPEN They're all routine, they're all enjoyable. I'm not
sure about easier, they're all different that require different
preparations for getting ready but I'd like to go back and own
six, eight, a dozen more of them.

For Paul Scully-Power. Paul, how does it feel to be up there
on your first flight? I guess it's a little different from the
hot dogs (garble) airport on the Australian beaches.

SCULLY -POWER In what (garble)? Actually, it's an all new
environment but it's been remarkable just watching myself and
everyone else how quickly a person reacts and adapts to that new
environment but in a day or so you're playing around here. It's
just like you've been living here all your life. Much like
living in (garble), doesn't take much more.

STS 41-G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 11

Paul, another question for you. Can you remember what was
going through your mind in the moment before the blast off and
when you actually lifted off Earth and headed this way?

SCULLY-POWER Well, I just layed back and just before (garble)
Bob Crippen said to the whole crew, "standby for the ride if you
like". That was an understatement and that's what we were
doing. We were just laying back and letting it happen to us.
(Garble) flying off you really know you're going somewhere.

Question for Sally Ride. Sally, within the next few hours
you're about to become the first American women into space. Is
all waiting for that period you'll be outside the capsule itself?

SULLIVAN Well, this is the other Sally and actually we haven't
even gotten into that part of the checklist that checks out our
space suits and gets them ready for the EVA. We're looking
forward to doing it tomorrow. They all checked out good prior to
launch at the Cape and we have no expectations that we'll get
anything but superb performance out of the suits again.

Kathy, how long will you be outside the vehicle itself?

SULLIVAN Kathy will answer that.

RIDE Kathy will be out there about three hours.

We're having an identity trouble with this Sydney. David
you've had a communication problem. Have you lost communic., tion
for a period of time in the past 24 hours. Does that mean that
you a lot of the data that you had hoped to send back to Earth
you had to hold up there? Goodbye.

RIDE Well, yes that exactly right. The SIR-B experiment which
relied only on our optical recorder on its earlier flight, this
time has three different ways of obtaining data. Two of them are
dependent on TDRSS so of course there's been some reduction in
those two types of data taking. Fortunantly however, there is an
optical backup and a tape recorder onboard for which we have
(garbled) and which we can use for a temporary storage media.
The know the SIR-B team has really been working hard in the last
couple of days to keep up with all of their data requirements and
keep the experiments going despite these hits and I'd like to
give them my compliments for pulling it together and putting all
their resources to good use.

You have had a problem over the past three days and it did get
up to around 32 - 33 degrees selsius didn't it?

CRIPPEN Yes, we did have a problem with our flash evaporator
which is used to cool the vehicle normally and we did actually on
purpose raise the temperature inside the cabin to try and solve

STS 41-G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 12

that problem because there appeared to be some ice that built up
on the unit itself and in fact I believed we proved that to be
the case a little bit earlier today and we've cleared up the
problem. In fact raising the temperature inside the cabin it did
get a little bit warm but as we stated earlier for those of us
that are used to being in Houston during the summer that was the
flight being at all. You notice that we are all dressed in our
coolest appararel anyhow. It's quite comfortable in the cabin
now.

(Garble) in Australia (garble) it was nothing like that, it
was alot colder.

microphone, you know, I gather that earlier today you actually
spoka to your father in (garble) Australia.

SCULLY-POWER Yes, that's correct. The (garble) NASA station
now but its true to Yaragadee and I was able to talk to my
father, my sister and my brother in law which is pretty good
because they had originally intended to come over and watch the
launch but were prevented at the last minute from doing so so I'm
very pleased for (garble) for allowing that to happen.

(Garble) in Australia now in (garble). You've got a message
for them.

CRIPPEN Hang in there and we'll see you all Saturday at lunch
time at the Kennedy Space Center.

Question for Bob Crippen. All of Australia has played an
important part in the American Space Program virtually from the
very beginning. But in specific terms, what all are we playing
in this mission?

CRIPPEN Actually, the tracking sites you have stated have been
a very important part of our space program and has continued to
be so. We use a (garble) out at Yargaddee which is UHF only site
which has been extremely important to us for communications
studying out on STS-1. We recently, in fact on this mission,
inagorated (garble) as a U-site and has been extremely helpful
especially in - with the occassion of losing our capabilities
goes through our TDRSS satellite (garble) for an extended period
of time and all specific ground stations that we had were very
important to us to get information up to us from the ground to
solve some of the problems that had onboard and we appreciate all
of the help the Australians have given us.

PAO Challenger, we are now going to Jakarto and hopefully
you'll be hearing from your colleges in Jakarto.

PAO This is Houston Press Center. Do you copy. This is
Houston Press Center. Do you copy, Challenger? Challenger?

STS 41-G INFLIGHT CREW PRESS CONF p9j 10:37 AM 10/09/84 PAGE 13

CRIPPEN Yes sir, we copy loud and clear.

PAO Okay, we're going to switch back to Houston. Rebecca
Chase, ABC.

REBECCA CHASE (ABC) This is for Sally. It looks like you're
getting continuing experience with the remote arm. I wonder if
you could tell us a little bit more about what you're learning
with the use of that arm and also it looks like from here that
the guys are letting the men do most of the work. Is that the
case?

RIDE I ' m sorry.

CHASE The guys are letting the women do most of the work. Is
that the case?

RIDE You got it right the second time. Both Dave and I can't
use the arm quite a bit on this flight and I guess one of the
things we're learning is is that it is good for a lot more than
it was originally thought. So far this mission, we've used it -
we'd bring it over to the side, very close to the side hatch
which is right behind us incidently and used it to (garble) dump
above the waste water tank and the supply water tank and its
critical for that right now. We also used it to deploy oh, I'm
sorry, to stow and latch the serbiun antenna to push it down the
very last part of the way and we also used it to shake the
appendages loose on the ERBS. And if we haven't been able to do
that I'm afraid we would have had to bring that satellite home.
So besides just being used for pulling things out of the orbiter
and releasing them into orbit and retrieving things from orbit
its turning out to be a very useful tool. Everybody aught to
have one.

PAO This is Houston Press Center. Thank you very much. We're
going to call it a day.

CRIPPEN Sounds like a winner John, thank you very much for
joining us.

END OF TAPE

STS 41G CHANGE OF SHIFT BRIEFING plOj 10/9/84 11:45 a.m. Page 1

PAO Welcome back everybody and we'll begin with the

debriefing from Flight Director Cleon Lacefield.

LACEFIELD We had a very good morning shift this morning. Uh,
we got TDRS back online on rev 58. Our flight day four summary
of our experiments of what we have accomplished. Yesterday, we
accomplished 100 percent of file, 60 percent of maps, 44 percent
of LFC, and 35 percent of SIR-B. So far with SIR-B, we've used
up five tapes, we've got two left and we've got three dumps
scheduled today, so we hope to gain some on the tapes. Of the
eight hours of optical recorder, they've used six of those
eight. We have done an ORS transfer for A this morning, it went
very well. We were predicting to transfer 132 lb in 33 minutes
and we transferred 133 lb in 33 minutes. So, what we're finding
out is that we're getting better heat transfer than we thought we
were going to get. It's very predictable and the transfer that
we did today is a duplication of the two A transfer and we're
getting very repeatable results. We did a supply water dump this
morning. It went very well. We dumped the water down to around
25 percent. We did our FES B checkout. We got FES B back on the
line. We were able to go to the high set point and dump 56 lb of
water through the FES and now we're back in the normal operation
of the FES and the cabin temperature is now 80 degrees and 30
percent humidity. When we started the procedure, we were at 87
degrees and 57 percent. So, we're showing a marked decrease in
the temperature and the humidity. We expect to be down to 75
degrees with about the same humidity in the next shift. This
morning, Paul Scully-Powers, as he said on the crew telecon, he
did talk to his sister, his brother-in-law, and father and he
sounded exceptionally well. He was doing extremely well. The
crew looked very good during the press conference and they're in
exceptional spirits. When I came over here, we were practicing
the EVA in the wet F and they had just finished up that exercise
as I was walking over. The OMS pod survey, what we saw after
looking at it again, is there was no frizzy left, but there was a
layer of RTV. And with that I'll open it up for questions.

PAO Okay, let's take questions here in Houston first.

Mike Meechum from Gannett.

MEECHUM Cleon, can you explain the significance of the

better heat transfer here, the fact that it apparently it is
spreading out better along the line? Tell us what that means.

LACEFIELD Remember, there are two lines that we're watching,

one is the idiobatic line and one is the isothermal line. The
idiobatic line is where we worry about getting individual
hotspots where we're not transferring heat. The isothermals is
where we're getting a good convection of the fluid and we are
transferring very well.

STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PM 10/9/84 PAGE 2

MEECHUM And you're not getting the hotspots, in other

words .

LACEFIELD That's right.

MEECHUM It's working better on the isothermal line and is

not working badly on the, if that's the way to phrase it, on the
idiobatic line.

LACEFIELD Well, what we're doing is we're plotting the
results and seeing whether we're following the isothermal slope
or the idiobatic and we're following the isothermal slope.

PAO Your name and affiliation, please.

HAZEL Carl Hazel with CBS News. We're about halfway

through the mission now. Could you sort of put it in
prospective. I think the perception is that you've had a whole
lot of niggling problems daily. Could you sort put the whole
thing in prospective and maybe compare it with the other Shuttle
missions .

LACEFIELD As far as the system goes, the only two problems
that we've really had are the Ku-band antenna and the flash
evap. As far as the other system, the RCS system, the ECLS,
environmental control, the waste control system, and the GPC, the
avionics are doing extremely well. We have not had any problems
in those other areas, so, it's just that the two problems that we
have had impacted the way we were going to try to get data for
the SIR-B experiments. And that's why I think it's come to the
forefront as much as it has is because it did effect the SIR-B
experiments, but other than that, the flight has gone extremely
well .

PAO Frank Seltzer, CNN.

SELTZER Cleon, a question on the SIR-B antenna, I asked

Kathy during the news conference. What's the liklihood of you
closing up the SIR-B, stowing it for the EVA and then having them
actually do the physical stow? Do you think you're going to be
able to get it back where the microswi tches will make contact and
you'll be able to use it that way, use the pyros?

LACEFIELD Where were at when we did the tests yesterday and
John talked about this a little bit on his shift last night, was
that we did not pass the test and we did not get the antenna
close enough to latch the pyro latch, if we were to try to do it
with the pyro, pyro fire. So, where we're at is we're going to
definitely try go ahead and do a normal latch and if that works
then we won't have to any further action. The second thing that
we're looking at before we do a pyro stow is just have the crew

press down on it and latch it for us when they're on the EVA.
STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PM 10/9/84 PAGE 3

SELTZER Is there any further tests scheduled? I know

you've lost some time on the SIR-B data takes, is there any more
operational tests to see if you can get a good stow on that.

LACEFIELD No, we aren't planning to do any further testing

on the stowing of the antenna.

PAO Dan Molina, NBC News.

MOLINA Will you try that latching procedure before the

EVA, I would assume that's the case?

LACEFIELD Oh, yes, we will go ahead and we're going to stow

the antenna and bring in the Ku.

MOLINA If you're successful in latching it, when you try

to latch it normally, before the EVA, will you then unstow it

again after the EVA, or will you just leave it stowed?

LACEFIELD Our thinking right now is that we believe we're
going to have trouble on the EVA with the normal stow and latch
and where we're at right now and what we're tellingt the customer
is that when we stow it on flight day seven, that's the end of
the data takes for SIR-B. We don't plan to unstow.

MOLINA One further thing, if you know, how did the wet F

business come out? Are the preparations going pretty well? Are
you set to send a procedure up to them now?

LACEFIELD The crew evaluated several procedures this morning
in the wet F. One of them was just pulling the antenna around
and practice lining it up so that we can do the two little pin
tricks that we're planning to do with our IFM . That seemed to go
extremely well. They both were able to sit on top of the
antenna. I don't know if you were able to see it, but they
straddled the antenna and they were able to look right down at it
as they moved the antenna to see where the pins would line up, so
that looked pretty good. They did practice some other things
where they were putting a sleep restraint around it, to say,
"Okay, if we couldn't pin it, can we tie it down," and some of
that. I don't know how that went, I was watching the press
conference .

MOLINA What was the cover on the Ku-band antenna all

about?

LACEFIELD That was a sleeping bag. What we were trying to do
is put that over it and see if we could tie it down, if we can't
do the latching. The last thing that looked at was the pyro stow
where we would, you know, we would separate the antenna and then
stow it in the Orbiter bay and I don't know how that worked. I

know they were looking at different places to stow it and I'm not
STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PM 10/9/84 PAGE 4

sure if they found an acceptable place or not and all those
results, they're going to be debriefing that here in the next
several hours so we should know by this evening what options that
we really want to pursue and the crew was interested in that and
they were wanting to know if we could talk to them this evening
at the evening status, they asked John that, then he said he
thought that we would be able to talk with them then and have a
message to them tomorrow.

PAO Carlos Byars, the Chronicle.

BYARS Cleon, on the SIR-B antenna problem, I'm sorry let

me rephrase that, as far as the Ku-band/TDRS uplink, are you

planning to make a couple of dumps, I think you said three.

LACEFIELD Right.

BYARS Are these going to be of single tapes or are you

going to try to dump two tapes on each one and would that be
possible perhaps using your other C-band network for
communications.

LACEFIELD We have looked at that Carlos. The problem is that
it takes us 15 min to change out a tape, 7 1/2 min to rewind the
tape, so that once we go ahead and dump a 20 min tape, we've got
all this overhead and we use up most of our TDRS pass trying to
get another tape on line. So, we'll get a partial dump on the
other tape. What we ask the SIR-B people to look at is on those
passes, if we could go ahead and dump part of that second tape
and then not have a problem with any of their data coming back on
the other side and they are evaluating that.

BYARS So, there's a possibility you might dump a tape and

a half?

LACEFIELD Something on that order. We're looking into it.
But, if we're afraid of overriding data that's already on the
tape, we aren't going to take that chance and that's what they
were wanting to determine.

PAO Okay, your name and affiliation.

GREENWALT Frank Greenwalt from the Los Angeles Daily News, I
take it you are opting in favor of the EVA activity of shutting
the SIR-B antenna rather than the canned arm.

LACEFIELD We would like, that's right, we'd like to go ahead
while they're out there and try the EVA first before we try the
arm.

GREENWALT Is that because it's easier?

STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PM 10/9/84 PAGE 5

LACEFIELD It's much easier for them to go over and just press
on it, it won't take very much force to do that.

GREENWALT And also of any recent weather reports from Cape
Kennedy?

LACEFIELD That's a, the Cape weather is getting extremely
interesting. In the next 24 to 36 hours, they're forecasting
that Josephine will be a hurricane. There's a high pressure
ridge over the north east. It's building up a good gradient that
will keep it from going north and probably push it toward the
Cape. And they're thinking that they'll start seeing the effects
of the storm sometime late tomorrow, at least that's what they
said when I was going on shift. Another high pressure area over
the Great Lakes is also going to help the high pressure that's
already there which is just about going to guarantee that the
storms doesn't go north, as much as you can guarantee storms.
And so the storm is moving very slow. It's in the four to five-
knot region as far as movement. It's still moving kind of north,
northwest, which if you drew a line with it, it's going right
toward the Cape. We asked them if we thought it would pass over
the Cape. The weather man said that even if it passed over the
Cape, he's not sure whether the backside of the storm will cause
us a cloud or a rainshower problem that would still make the Cape
no/go. So, we are watching the weather out there extremely
close. We're going to try to go in there, if at all possible.

GREENWALT I know this is early but do you expect to be able
to make your decision about landing location, anything but last
minute. Is is going to be one of these last-minute things like
have been in the past where....

LACEFIELD When you're trying to land at the Cape, it usually
winds up a last-minute decision. And the reason I'm saying that
is even if the weather is clear, I think you've noticed that
they've had quite a bit of crosswind the last several days and
this high pressure area is also causing that crosswind.

PAO Lee Dye, Los Angeles Times.

DYE What's your latest feel for what actually went

wrong with TDRS now, and do you expect any further problems with
it?

PAO We've got a statement referred to us from Goddard

attributed to Gary Morris, who at Goddard is the STS network
director, and I'll read it to you: "During orbit 50, the
tracking and data relay satellite experienced a control system
anomaly which resulted in a loss of attitude stabilization. The
subsequent attitude recovery process involved a series of
detailed spacecraft systems reconfigurations, maneuvers, and

confidence tests. The TDRS resumed supporting the Orbiter on
STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PH 10/9/84 PAGE 6

orbit 58 last night and continues to operate nominally, normally,
and an anomaly review board consisting of representatives from
NASA, Spacecom, and TRW will convene this morning at the White
Sands, New Mexico, to discuss technical and operational
circumstances surrounding the incident. Preliminary evidence now
suggests the anomaly may be related to an operations problem.
The investigation continues however with a cause of the anomaly
not finalized." And now you know as much about it as we do and
any more questions about that will have to be referred to
Goddard. We're trying now to put together a telephone conference
or a question and answer period with Goddard, which we hope to do
about 2 o'clock this afternoon central time, right after the
science briefing. Paul did you have a question? Paul Recer, AP.

RECER On the fixing the antenna, the Ku-band antenna,

during the water thing they had the sleeping bag out there. Is
it your plan now to include the sleeping bag with the equipment
they take into the cargo bay with them?

LACEFIELD That is one of the options we're looking at. We're
looking at one of the options to tie it down with a restraint.
Hopefully, we can narrow the options down so that we're going out
there with a couple of ways to do it, either the pinned routine
or we'll go ahead and separate the antenna and stow it. If we
can't find a good place to stow it and the option with the sleep
restraint looks acceptable then we'll do the pin routine and try
the sleep restraint. But, we have not finalized that and we
should have a good answer for you this evening as far as what
options are acceptable.

RECER And additionally, if you've got a prospect, if the

storm Josephine stalls out so that you're able to get in, but you
still have the prospect of a full blown hurricane arriving 12 to
14 hours later with the craft there, perhaps still on the runway
or whatever, would you go ahead and bring it in or would you put
it in the California to protect it from the storm itself?

LACEFIELD I really don't have an answer for you.

PAO Your name and affiliation please.

MONROE Margaret Monroe, Southern News. I was wondering if

you could tell me how much more SIR-B data you would 1 ve gotten,
if you had cancelled this morning's press conference? And also
have you offered to let Garneau speak to his family?

LACEFIELD Yes. Well, I don't know about speaking to his
family, but he did wish his wife a happy anniversary last night,
during his sleep.

MONROE But you don't know if he's been offered to actually

talk to them? / t

STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PM 10/9/84 PAGE 7

LACEFIELD
MONROE
LACEFIELD
MONROE

conference. . .
PAO

No I don't.

And about the press conference.
I beg your pardon.

'if you had cancelled this morning's press
How much more TDRS...

LACEFIELD Oh, how much more TDRS would we have picked up?
What we would 've done on that, would 've been about a data take of
around, and I'm estimating, around 10 minutes. What we would' ve
done is the data take on the front end and a dump of the tape on
the backend.

PAO

Right back there please, your name and affiliation?

BELZBERG Wendy Belzberg, ABC News. Firstly, have you

altogether ruled out the possibility of delaying the landing for
one day, if the weather conditions look more favorable at the
Cape for Sunday landing?

LACEFIELD Okay, our current weather rules say that if we've

got acceptable weather, say the nominal end of mission, and we're
predicting accepatable weather with a one-day delay, we will wait
the day on orbit.

BELZBERG And also was that 35 percent achievement for the

SIR-B data, was that today's?

LACEFIELD

That was yesterday's.

BELZBERG So, by the time that you stow SIR-B for the last

time and no longer taking any more data, what percentage will you
have accomplished of the SIR-B experiment?

LACEFIELD I really don't have an answer for you. All I would
have is an estimate and it would be in the 40 to 50 percent range
which is what we have been estimating all along. And that would
be taking into account this 35 percent hit that we got yesterday.

PAO We will have a precise number for you before this

mission is over, certainly. Did you have someone over there,
Pete?

MEDIA On the Ku-band stowing, the pin routine, does that

mean actually unhinging the entire antenna?

LACEFIELD

No, all we're talking about doing with the antenna

is we're going to bring it in with direct stow and that's from
STS-41G CHANGE OF SHIFT BRIEFING plOj 11: 4b PM 10/9/84 PAGE 8

the inside and that's no impact. And then what we're have the
crew do is just bend the gimbal around like this so that they
line up those pins and then from inside we'll throw a switch and
lock the pins and then we're going to have them move the alpha
gimbal up, line up the pins and then inside we'll throw the
switch again and fix those, that gimbal, but everything stays
attached.

PAO Craig Covalt and Pete.

COVALT I'd like to follow on his question, will you do

this at the start of the EVA and is Kathy going to be lead from
the standpoint that she was lead on things like payload bay door
closings and so forth.

LACEFIELD I don't know that we've decided the order in which

we'll do the EVA yet. It's still under evaluation, depending on
how complex we find out that the WET-F exercise was today. So,
we'll know some more cn that this evening.

COVALT And on Sullivan...

LACEFIELD I don't have an answer for you there, either. I

know that Pinky Nelson was pretending to be Dave, and Jerry Ross
was pretending to be Cathy today.

COVALT We noticed that too. Let's see, I had another one

on that too. If you did not have an EVA scheduled anyway, would
you be doing and EVA to stow that antenna, is it that significant
of an issue or not?

LACEFIELD If we did not have an EVA scheduled?
COVALT This was a non EVA mission.

LACEFIELD We would seriously consider looking at that before
we would commit to an EVA. Very seriously. And the reason I'm
saying that is because we have seen movement: in the beta gimbal
with our OMS burns and RCS burns. So we do not believe we have a
locked gimbal there. So what we are trying to do now is enhance
the KSC turn around, and if we did not have an EVA scheduled, I m
not sure that we would go out and do an EVA for that.

PAO Jim Asker from the Post

ASKER I don't want to bit the hand that feeds me, Cleon,

but what sort of things went into your reasoning on deciding to
go ahead with the press conference. Do you feel like your were
taking a terrible risk given the problems with getting SRI-B data
back to Earth.

STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PM 10/9/84 PAGE 9

PAO We didn't have a press conference scheduled

originally because originally he was suppose to get off shift at
9, and the press conference would have fallen right smack in the
middle of the crew conference. Is that, or you mean

ASKER I mean the in-flight press conference. Was there

serious thought given to cancelling it to make sure that the data
from the radar would get back.

LACEFIELD Ah, we have worked real hard this morning to get the
press conference and to make sure we were set up for it. And we
worked with the SIR-B people to work around the requirements, and
I believe, they didn't have to give up anything significant for
that press conference as far as their data takes.

PAO Okay, Mike Meechum

MEECHUM I'm not sure quite sure that I understand the roll

of the sleeping bag or the sleeping restraint would play in
this. Are you talking about some how covering the dish so that
as to prevent damage or to actually use it as a strap somehow to
fold it down.

LACEFIELD We are talking more of using the sleeping bag as a
strap on the antenna if we can't pin it. That gives us something
so that we can tie to different places in the orbiter. That
gives us straps so we can tie to different places so that we can
hold the antenna fixed. That's what we are trying to do there.

MEECHUM There are straps on the sleeping bag that you will

use to strap

LACEFIELD That's right.
MEECHUM Okay.

PAO Going to take one more question here, then go to the

other centers. Carlos Byars, Chronicle.

BYARS Maybe I misunderstood you awhile ago when you said

something to the effect of considering removing .. .one of your
options was to remove the antenna. And another that you
discussed was pinning it. So this was apparent to me two
different things. Is there any plan in the works or an option
that would involve removing the antenna or part of, perhaps, just
the dish from its mount and putting it somewhere else in the
payload bay.

LACEFIELD We are looking at two options. You are correct.
There are two options. One is to stow it and pin it. The other
option is to disconnet the antenna. Where the antenna

STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PM 10/9/84 PAGE 10

disconnets, is way back here at the arm so when you disconnect
it, there is nothing that would interfer with the payload bay
facil. Everything that goes out is disconnected right there at
that joint.

BYARS What do you do with it then. Will it fit into the

air lock

LACEFIELD Oh, no. What we plan to do there and that's what
they were doing in the WET F exercise is looking for someplace to
tie it down. That's why they were swimming in the payload bay.
They were looking for a suitable spot to put a couple of straps
across it to hold it.

BYARS Okay, how does this compare in complexity with the

pinning operation.

LACEFIELD The only way we would go with removing the antenna
is if we had the stuck beta gimbal. It was actually frozen and
we couldn't get it out of the envelope of the payload bay door.
That's the reason we are looking at that even though we have data
that says that we really don't think that the gimbal is frozen.
We think its an electrical problem with that beta gimbal.

PAO Okay, lets go to the other centers, and then we will

come back to get your remaining questions at Houston. First
we ' 11 go to Ottawa

from TVA NETWORK I have a question on the Shuttle the maging
radar. That piece of equipment uses radar to produce photograph
like images of hard surface. I'd like to knew if astronauts see
driver clean the Shuttle, the result of that radar that is
pointed to the clouds.

LACEFIELD We don't have any way of looking at that onboard.
That is all dumped to the ground, and we will be looking at those
pictures postlanding.

TVA NETWORK Also, that there has been pictures taken of the
Montreal area. What are the interest for Canada of those
pictures .

LACEFIELD I'm really not sure. That would be a good question
to ask the SIR-B people. I know yesterday that they had a
requirement to look at the drought stricken area up there, and
that request was made and honored yesterday with the data takes.

PAO Yeah, there will be a science briefing this

afternoon that you may want to tune into that, that question will
either be addressed or you can direct it to them. Okay, now to
Kennedy Space Center, Florida.

STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PM 10/9/84 PAGE 11

MCFARLAND - Saturday Night Magazine Have you any information
on whether yesterday's excessive heat had any effect on Garneau's
experiments and have any of them been rescheduled to be carried
out under more normal conditions?

LACEFIELD As far as we can determine, and we did get a status
from Marc on what he accomplished last night, and I'm sorry I
didn't bring it with me. But, the way it looks is that he
accomplished what he was trying to yesterday. He was able to get
his speam and, I believe, his oglow, and I think he accomplished
what he was trying to do yesterday.

from the Globe and Mail in Toronto I wanted to ask a question
about the OHMs pod damage. You say all the frizzy in that
section is gone, are you, will you be able to avoid damage on the
re-entry?

LACEFIELD What we are talking about is the minor erosion of
the epoxy graphite that is under the, that is in the gap that we
lost. We'll have minor erosion there, but we are not expecting
anything significant.

PAO Okay, that's all from Kennedy. Back here at

Houston. Let's hear your name and affiliation.

DAVE JACKSON - Time Magazine Did you every consider for even a
moment some sort of repair of that frizzy blanket and the tiles
during the EVA?

LACEFIELD No, we have not considered anything to repair

JACKSON So, it's not even a possibility that it poses any

danger at all.

LACEFIELD No.

PAO Frank Seltzer

SELTZER Is there any thought in Mission Control to having

Crip or somebody take a picture of Josephine on one of the
earlier revs to play back this afternoon?

LACEFIELD I know they were planning on taking some pictures of
Josephine this afternoon. They talked about that in the press
conference, and I know Paul Scully-Powers was going to take a
picture of it. But I'm not sure whether it is going to come down
or not.

SELTZER I was wondering if they were going to do it on the

VTR and do a playback dump in the afternoon pass, from Goldstone.

LACEFIELD I really don't know. We can find out.

STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PM 10/9/84 PAGE 12

PAO Paul Recer, Associated Press.

P.ECER Have Leestma and Sullivan done any practice session

of any description in the WET F with the Ku-band antenna or is
this going to be totally new equipment to them.

LACEFIELD I really don't know. I know they, as far as the Ku-
band specific question, I think I'll have to find out for you. I
really don't know at this time. They are familiar to what it
looks like and where the pins are in the boxes and stuff like
that, but as far as actually in the WET-F moving it around, I
don't know if they have done that.

PAO Hugh Dye

DYE Just one more quick one on TDRS. Why do you use

TDRS time for a data take. Can't you take your data when you
don't have TDRS and then dump it by tape.

LACEFIELD The attitude with the Ku-band antenna fixed, like,
you're talking about for the press conference?

DYE Well, for anytime. I mean, I don't understand why

you use TDRS time for the data take.

LACEFIELD Oh, as far as the data take, it doesn't hurt us at
all as long as we don't need to use the Ku system. We have the
S-band, and we are getting data normally. And we are recording
the SIR-B data on the tapes on-board. Now if you want to dump
that data to the ground, then we have to use the Ku antenna on-
board to point towards TDRS.

DYE But can't you take, at any time, whether you have

TDRS or not by using

LACEFIELD Oh, you can't point at TDRS if you don't have it.

DYE No, no, no, I mean, can't you, I'm not making myself

clear, can't you acquire your data on tape rather you have TDRS
or not and then use all of your TDRS time to dump tapes.

LACEFIELD We are acquiring data all the way around. They do
there data takes independent of TDRS and when we are over TDRS.
They are doing data takes off the coast before we ever acquire
TDRS.

DYE My question is then why do you use TDRS time for

additional takes.

LACEFIELD Because they are wanting to get pictures of North
America and Europe.

STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PM 10/9/84 PAGE 13

PAO Yes sir.

FRANK GREENWALT - Los Angeles Daily News Are they using the
tank to use simulations of the SIR-B antenna closure or do you
think that's necessary

LACEFIELD The antenna is out there. I think they, the only
thing that isn't modeled, I don't believe the latches are modeled
with the antenna in the tank but they can go up and see about -
pushing it down. As far as having the right, the correct, forces
and stuff, I'm not sure that that's modeled in the WET-F model.

GREENWALT But they are exercising

LACEFIELD It is out there, yes.

GREENWALT Thank you.

PAO Carlos Byars

BYARS On the following that question, if you get an

indication of a normal latch or you get a latch after they mash
it down, will they then go ahead and tie it down. If you get a
normal you don't have to tie it?

LACEFIELD That's right.

BYARS Okay. Secondly, in communicating these steps and

procedures on working the Ku problem, up to the crew, the EVA
crew, will that be done as normally as through, what through the
console or will the two folks that were practicing it in the
tank, come over and talk to the EVA crew directly?

LACEFIELD Pinky Nelson is going to come over and talk
directly. He will be the CAPCOM for the EVA, I believe. We have
devised a picture to show them about where the pins are and that
picture will be in the message that is sent up. We will have the
procedures that are involve with how we want them to go through,
pull the beta first or the alpha or whatever, and that will be
worked out by Pinky. So it will be a combination.

PAO Anybody have anything else? Jim Asker

ASKER I want to be clear on understanding the SIR-B

antenna and stowing it. As I understand it, your normal
procedure had the EVA been today, you would still want the
antenna stowed?

LACEFIELD We were always planning on stowing the antenna
during the EVA. And then afterwards, no problem, we were always
intending to redeploy SIR-B and take data through flight day 8.

STS-41G CHANGE OF SHIFT BRIEFING plOj 11:45 PM 10/9/84 PAGE 14

ASKER Why is it that you have to stow the antenna? It's

not a safety factor, I take it?

LACEFIELD The antenna sticks so far out that we were always
going to have to stow it so we could do the EVA.

ASKER Just because it would get in the way, that sort of

thing?

LACEFIELD There was a couple of things. We wanted to make
sure the antenna was off and saved and the Ku-band was off and
saved, and that's always been the plan from day 1, to have that
stowed .

PAO A couple of notes phoned over from the Control

Center. They have verified Garneau's experiments were not
affected by cabin temperature. Cabin temperature has gone down
to 78 degrees, 32 percent humidity. And don't take a long
lunch. Keep close to us and check on that press conference early
this afternoon with Goddard. And I guess that's all, thank you,
very much. Cleon, thank you.

END OF TAPE

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 1

JAMES KUKOWSKI Good afternoon. I'm James Kukowski, public
affairs officer for Space Science and Applications at NASA
Headquarters. Welcome to our science briefing this afternoon.
We're going to discuss some components of the OSTA-3 payload. To
my immediate right is Bruton Schardt who is program manager for
the large format camera. Next to him is Dr. Mark Settle, the
program scientist for OSTA-3 and SIR-B from NASA Headquarters and
to my extreme right Dr. Charles Elachi, the principal
investigator for SIR-B. Dr. Elachi is from the jet propulsion
laboratory. What we'll do now is to get a quick rundown briefing
on the large format camera activities that have been going on and
then following that we'll hear from Dr. Settle and Dr. Elachi
regarding the SIR-B. First we start off with Dr. Schardt.

BRUTON SCHARDT I'm very pleased to report that the large format
camera has been operating very successfully and to date we have
coverage on 34 orbits and on some of those orbits we have more
than one data pass so that's a total of forty data passes. In
terms of frames, a frame in a large format camera are nine by
eighteen inches. We've obtained 1432 frames of photography. As
of this time we've used up about 64 percent of the film we are
carrying in the camera and that is just about where we expected
it to be at this place in the mission. The camera carries around
thirtysix hundred feet of film, 3664 feet to be exact. Since
yesterday when you had been issued an announcement of how many
data passes we had obtained, we've obtained twelve more which
makes up that thirtyfour orbits that I referred to. The next
pass coming up from the large format camera is orbit seventy
which will be a pass across part of Canada, the mid part of the
United States and down over Florida. And I believe that's very
close to taking place now.

JAMES KUKOWSKI Okay, we'll hold the questions for the large
format camera till we go through the entire presentation. Dr.
Mark Settle is the program scientist from Headquarters. He has a
statement here and then we'll move on to Chuck Elachi.

MARK SETTLE I would just like to make a few general remarks. I
think most of you are aware that we've been replanning this
mission on sort of a day to day basis as far as collecting the
radar data. We've run into some small problems which have
affected our data collection plans. People have raised questions
about the factors that are being used to make the decisions about
where to acquire data and where the depart from our original
plans. What we're really trying to do is to ensure that we have
a number of key investigations in each one of several
categories. I think Dr. Tilford described earlier this week so
we want to make sure that we are maintaining those high
priorities sites so that we can do those studies we want to do in
the fields of geology, vegetation science, hydrology, archeology,
and a few related diciplines. At this time, we expect that by
using the KU dish and the high data rate system that we used to

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 2

relay data down through the TDRSS satellite, we should quite
sufficient data during the mission to provide all the
investigators who formed the SIR-B science team, a total of
forty^our individuals, at least some of the imagery that was
originally requested so at this time we don't really see that any
single investigator will actually have to do without data. I
guess the other, the general remark I'd like to make is I think
over the week we've seen a case where the whole Shuttle program
has a tremendous capability to sort of heal itself. As we go
along in time we faced a few hard points early in the mission and
I think we really owe a debt of gratitude to the people up on
orbit, the crewmembers, for helping us with a new flight
maintenance procedure where we immobilize the high data rate
relay dish onboard and for stowing the antenna. The (garble)
proms we had at a higher altitude really would have been more
catastrophic if we were not able to secure the antenna and move
to a lower altitude. So a debt of gratitude to those folks and
it kind of goes without saying that the people here at JSC as
well. They're very responsive and right now are working hand in
glove with us to try to maintain as many of the original
opportunities that have been planned for data acquisition.
That ' s about all .

KUKOWSKI Thank you, Mark. Before Dr. Elachi begins his
presentation, we are currently waiting for courier with two
images. It should be here momentarily or we hope it's
momentarily. We'll also have a video tape of the long sweep we
see over here that Dr. Elachi will address in just a moment so,
they are on their way. We don't know exactly when the courier
will show up so if you'll bear with us we'll get it to you as
quickly as possible. So now here's Dr. Charles Elachi, jet
propulsion laboratories ' s principal investigator on SIR-B.

CHARLES ELACHI Okay, at first I'll give you an iteration or
goes with summary of what we originally planned and what we have
accomplished so far. As you know through the briefing at KSC we
originally planned to acquire fortytwo hours of digital data.
Following a series on everyday having images at multiple angles
and eight hours of optical data. As a first following counter as
you know was the loss of the TDRSS communications link because of
the problem on antenna, the TDRSS antenna on the Shuttle. And
first we are faced with the situations that we might have to do
only was the seven tapes which are onboard which can only hold
about two hours and one third, or two hours and twenty minutes of
total data. So that kind of looked a little bit grim. We were
fortunate on day two, the astronauts were able to fix that
antenna and be able to dump the data on the tape you know
directly by maneuvering the Shuttle. So here I'd like to take
the chance to say that really that function that the astronauts
have done basically saved the experiment. That was a key factor
and were really owed them a lot and I want the name of the team
to thanks and for this help. And following that capability the

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 3

plan was to do four dump roughly per day. When you count those
four dumps each one being twenty minutes of data and the seven
tapes which they have onboard that would have led to a total of
about eight hours of digital data and of course eight hours of
optical data that we have. We did encounter a problem yesterday,
was the loss of the TDRSS communications during the day. So that
kind of hurt a little bit by cutting down on some of the data
takes. So the present situation as of now we have approximately
about four hours of digital data already in hand, either down
here or on the tapes which are onboard so that is at a minimum so
if we don't accumulate anything more we have at least four hours
of digital data. In the presencing there you owe the rest of the
day today and tomorrow if we get the dumps that are being
planned, we can get about six or seven hours of digital data in
addition to the eight hours of optical data. Now in keep six to
seven hours of digital data covers an area of roughly about the
area of the United States. That's still a very significant
amount of data that we'll be getting. As Mark said, we have been
really going on a hectic mode of free planning basically on a day
to day basis trying to concentrate on the primary science so we
can at least get a good set of data over a number of sides and
then in addition to get for each investigator some limited amount
of data so they can do some with there investigations. My belief
at the present time is I think even we will not meet all the
scientific objective, (garble) significant number of those
scientific objectives. I cannot give you a quantitive number
until we get to the end of the mission and we get the well, a
good estimate of what amount of data accumulated and over what
the areas we actually did all this coverage. Now I want to
report on some of this scientific results that already have been
accomplished. As you know one of our major objective was to
determine how well we can do surface penetration. One experiment
we were conducting in Nevada we actually buried the receivers on
the ground and buried a number of receivers below the surface,
down to a depth of about seventy or eighty centimeters. That's
what we were able to do. And had reports from the people on the
field that three times so far when the Shuttle passed by we
actually received back on the surface as well as we received it
on the subsurface receivers which had been buried below about as
I said seventy centimeters. I have seen a very clean act on them
and I do have here an example of one of the surface echos where
basically what we've seen, we see on a pattern as it's going
by. You know, as you see it here, you can see that's the
receiver on the surface in Nevada and as the Shuttle comes by you
see a strong signal coming up then it goes down, and even you see
the side loops of the antenna. So that's an indication that the
system is operating you know, nominally as expected. So that's
the first preliminary one which is related to the subsurface
penetration. The other way, a data take which was acquired on
orbit 37 over Canada, was actually flown to GPL and processed
overnight and the images are displayed here and to show here
running (garble) data briefly what you see here is an image of

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 4

about twentyfive kilometers wide and roughly about a hundred
kilometers long running from basically Vermont over Montreal and
starting from the right hand side you can see here is Lake Carney
and then there's the Bay Missisquois and here's the St. Lawrence
River, oh sorry, the Richelieu River, that you see crossing the
image in here. Then going to the St. Lawrence River going over
into Montreal, see here Montreal in the center and the Island of
Montreal, lie Jesus and City of Laval and you can see the Riviere
des Prairies and Riviere des Milles lies and here you see also an
the indication of the race track which is just northwest of that
area. Now the next slide, the Shuttle flew coming from this
direction from left to the right, moving at the speed of seven
kilometers per second and we have a sure video of this trip which
will show you as again as I showed earlier if you are sitting on
the Shuttle looking out, the astronauts have their eyes sensitive
to radar waves that's actually what they would have seen. This
image was taken a one p.m. so it was at night when it was
acquired and I'm sure that you are aware that the radar will
observe the surface irrelevant was the time of the day. So if we
can run now the video you can see it on the TV screen. This is
how this would have looked like if you were sitting on the
Shuttle and taking the ride yourself. That's starting from in
Montreal and you are moving now toward the southeast of the St.
Lawrence River, that crossing at the present time. And you can
see a cultivation field in that area River Richelieu, the Bay
Missisquois which is just at the bottom of the image and now
going into New Hamshire you are seeing area of Lake Carney, sorry
Vermont. So that will give a quick summary of where we are at
the present time as I said we are going in the process of free
planning basically on day by day basis in some cases, data take
by data take basis. And as the whole system those astronaut's
onboard and operation system here (garble) have an extremely
helpful. They are really bending backwards and being able to be
flexible and allowing us to do these changes at the last minute
so we can optimize our coverage as much as we can. (garble) give
you a quick summary.

KUKOWSKI Okay, lets start the questions now. I'll point you
out. Give your name and affiliation. We'll start here with
Craig Covalt.

CRAIG COVALT (Aviation Week) Dr. Elachi, two questions
really. To the image you got up here, that shows you have fairly
decent cross section of at least urban and farmland. What do you
that impresses you with the instrument?

ELACHI Okay, I think we see that the instrument is operating
nominally. You can see aiot of the detailed features in a number
of bridges here which are very well focused so that tells us that
the system has operated is very stable and is operating
nominal. Other thing shows very incouraging is that (garble) I
showed you earlier which was recorded on the ground it shows its

STS 41-G SCIENCE BRIEFING pUj LOOP" »/,./•« -CES
ant e„na pattern exactly -pef -^.p

Environment on the Shuttle. i

the performance of the system. ^
serious considering it? • h u I have been -

assessment I guess they 11 na v e j significant amount of our

. T"m fAirlv optimistic (garDie) don't be misled

Zst ot that time over on J " ^ ^ aeclded "°t to take it
.^nid had been nice to get D "V 1 v. i /, ( . the present time, bo we
because of it's limited capability at the p ^ Qr at

wiU cover each team member, we get at lea Nq
least some imagery over the side to ao h 8<jlentlflc

U«ble) to do some as Se sme^^downst ^ ^ ^ can meet to a

objective we can meei. xv r

lesser cent. Dr

instrument? said

passes in a aucic^
we did that inquire.

MEECHAM And where did you get the stereo,

. , -j- nAn think of immediately we
dr. ELACHI Okay, the ones t ha J ^ ^ planning
did take over Manchester, the J^iy you have already three

ssr. ;—...•>•

echo

HEECHAM (Garble, Freibutg .„

^anfover nSSHlS and^e or P~.- over the

Sift Valley in Africa also.

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 6

MEECHAH So you have reason to believe that the stereo - that's
the big plum here isn't it.

DR. ELACHI That is correct.

MEECHAM And you have reason to believe that that is going to
work as well?

DR. ELACHI That's correct. It has been acquired and based on
seeing that we can processes the data and everything is in a
nominal mode. We don't see any reason why that data will not be
successful .

A question Cor Dr. Schardt. You seem to really be giving a
very optimistic report here and my only concern is we've been
told on several passes that they only got thirtyeight percent, I
can't remember what it was, fortyfour percent I believe this
morning of the LFC takes, what am I missing here?

DR. SCHARDT Dr. Elachi referred to the replanning that he has
had to do at the SIR-B radar and that replanning has also
reflected on the large format camera so that our data takes, we
have planned essentially more data takes than we could take with
the film we've had. And so as he has given up some orbits we've
had to replan those so we've been in a mode of getting data in
areas that we would like to have gotten it, the one who didn't
know ahead of time that we'd have that opportunity. On answer to
your question I believe it is about the amount of data at this -
as of this morning, we have approximately the amount of data we
expected to get at this time around sixtyfour percent of the
mission.

So the fortyfour percent figure for instance from yesterday's
take is a misleading indication of how successfully you're doing.

DR. SCHARDT Well we've gotten somevery good data takes just this
morning for instance. I believe it was data take sixtysix. We
got about eightyeight frames over from England down across Europe
and into Africa. And this has been an unexpected orbit that
wasn't probably in the figures that you had gotten there.

CARLOS BYARS (Houston Chronicle) Dr. Elachi, what specific
targets have you obtained data on and what specific targets have
you missed? And I have a question for Dr. Schardt when you
finish .

DR. ELACHI Okay. We have a very large list of sites. I'm just
going to address the highest priority one because we have about
sixty sites and I don't think I can recall all of them. But the
one I think we're getting very good data on is the area in
Illinois. We're having extensive amount of ground to work on.
We have about sixty people on the ground making measurements.

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 7

Beside the Freiburg also the extensive ground (garble). These
are two vegetation sites of Manchester where were doing our
stereo imaging and just southeast of Manchester there is a number
of sites in Western Nevada and California. Also we are doing a
lot of groundfeed work and that's an area where we're actually
measuring the subsurface penetration. That's in the western part
of Nevada and we have a team of geologist doing some field work
in that area. We also got very successful pass over Sydney,
successful pass over Rift Valley in Africa which was a high
priority, about three passes in that area. The ones that we were
hoping were high on our list but we got so far only very limited
were the Hawaii and the (Garble) just east of South Africa. That
was an interesting area where we were planning to do studies of
waver interaction was a current and was our limited or restricted
capability we have missed - we were not able to cover that area
at the present time. So these are probably two high priority
ones that we were not able to do.

BYARS What about the city that you were going to try to get to
(garble) and the (garble) order?

DR. ELACHI Okay, the (garble). Unfornately the (garble) passes
will be on the last two days of the mission which as you probably
know we might not be able to operate that late, so unfornately
theie is a loss of (garble) will have to be lost for another year
or so.

BYARS Dr. Schardt, do you think you're going to get 100 percent
by the end of the mission? Your sixtyfour percent now, you think
you'll get 100 percent by the end of the mission?

DR. SCHARDT Yes, indeed. We will be able to take photography
with the remaining film. When the radar antenna is stowed, there
will be no more, I call them conflicts with the attitude of the
Shuttle, required to dump the SIR-B data so that like
approximately the last day we'll be able to assume in their areas
weather free. We'll be able to take data at that time and use up
all the film and probably use even more.

BYARS Are you just using -

I think some confusion again about the success for the
camera. What you need to understand is the percentages you see
reported on a day by day basis reflect the number of
opportunities required where you have a pass in the sunlit part
of the world.

BYARS Lets talk in terms of how many times you trip the cotten-
pickin shutter. That's what I want to know.

KUKOWSKI That's what he's telling you.

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 8

BYARS - how much opportunity, not how much you got.

KUKOWSKI Right. When you see for example thirtyeight percent,
that versus the number of opportunity that our in theory are
feasible but we're over subscribed as far as opportunities and
we'll completely fill up the film. So you may never see a data
that says 100 percent where every opportunity was exercised.

Misleading figure.

KUKOWSKI It's just a different - it's just one way of looking
at the way -

BYARS Lets see if we can hammer on this nail a little bit
more. How much - what percentage of pictures do you expect to
take of targets that were pre-planned, not things that your
shooting film on cause they're pretty and you got excess film
now, but targets that you pre-plan, how many, what percentage of
photographs do you expect to take not covered with clouds but
real pictures?

DR. SCHARDT I'd have to get that answer. I'd have to take a
harder look at our target areas.

BYARS Could we get it this afternoon?
DR. SCHARDT Yes .

KUKOWSKI Okay, we'll - we do have some questions from Auto.
We'll have a couple of more here and then we'll switch up to Auto
and come back so lets go over here to NBC.

DAN MOLINA (NBC) For Dr. Elachi. I take it that this
illustration, this picture that you have given us here really
doesn't illustrate some of the more sophisticated capabilities of
SIR-B.

DR. ELACHI That's (garble) this image as I said was processed
over night and it vas doing a very quick processing. Now the
more sophisticate capable you see it's particular one that we are
looking at the multiple angle and we're doing the stereo where
you can see where it's three dimension.

MOLINA I was wondering if this shows us anything that you
wouldn't see from normal areal photographs that sort of thing.
Is there any unique feature to - ?

DR. ELACHI - the (garble) we're trying to do in similar kind of
agriculture our area to see, particular when we're looking at
multiple angle, can we clasify for instance as an example, is a
different cultivation field and determine what kind of vegetation

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 8

BYARS - how much opportunity, not how much you got.

KUKOWSKI Right. When you see for example thirtyeight percent,
that versus the number of opportunity that our in theory are
feasible but we're ever subscribed as far as opportunities and
we'll completely fill up the film. So you may never see a data
that says 100 percent where every opportunity was exercised.

Misleading figure.

KUKOWSKI It's just a different - it's just one way of looking
at the way -

BY/iRS Lets see if we can hammer on this nail a little bit
more. How much - what percentage of pictures do you expect to
take of targets that were pre-planned, not things that your
shooting film on cause they're pretty and you got excess film
now, but targets that you pre-plan, how many, what percentage of
photographs do you expect to take not covered with clouds but
real pictures?

DR. SCHARDT I'd have to get that answer. I'd have to take a
harder look at our target areas.

BYARS Could we get it this afternoon?
DR. SCHARDT Yes.

KUKOWSKI Okay, we'll - we do have some questions from Auto.
We'll have a couple of more here and then we'll switch up to Auto
and come back so lets go over here to NBC.

DAN MOLINA (NBC) For Dr. Elachi. I take it that this
illustration, this picture that you have given us here really
doesn't illustrate some of the more sophisticated capabilities of
SIR-B.

DR. ELACHI That's (garble) this image as I said was processed
over night and it was doing a very quick processing. Now the
more sophisticate capable you see it's particular one that we are
looking at the multiple angle and we're doing the stereo where
you can see where it's three dimension.

MOLINA I was wondering if this shows us anything that you
wouldn't see from normal areal photographs that sort of thing.
Is there any unique feature to - ?

DR. ELACHI - the (garble) we're trying to do in similar kind of
agriculture our area to see, particular when we're looking at
multiple angle, can we clasify for instance as an example, is a
different cultivation field and determine what kind of vegetation

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 9

is in these fields. Now being on one single image I guess I
don't think we can do it, but hopefully when we do the multiple
angle and all the sides when we're doing ground work, field work,
then we can find what kind of algorithm or criteria we can use by
combining the images or we can separate it a different
cultivation .

MOLINA Thank you.

ERROL HAZELWOOD (CBS) Could you sort of characterize what is
being accomplished now that was not possible before?

DR. ELACHI Before the mission you mean?

HAZELWOOD Before the mission.

DR. ELACHI Okay, again as I said a collection of the multiple
angles forseeing images that have never been done before and that
was one of our top objectives to do it. Doing mapping of some
penetration in very specific experiment of actually putting
receivers below the surface and detecting how much the acqui is
going down so we quantitively when we go and see for instance
(garble) drainages in Egypt we can quantify how deep they are.
That was never done before. And first indication that seems that
was successful aa in the next part and the numbers we were
getting seemed to be consistent but of course they need a more
detailed analysis. These are two examples of things which
definately will be accomplished during this even the restricted
capability which was not possible before,

KUKOWSKI We will go to Paul Recer and then we'll switch to
Ottawa and after Ottawa questions we'll come back.

PAUL RECER (Associated Press) Could you interpret this a
little bit - this image that we have over here a little bit so
that the mailman in Kansas City can understand it. You got some
fields of white there on the left and then you got some fuzzy
streaks that look like mountain ridges on the right. What do
these things tell you?

DR. ELACHI Okay, let me go through some more specific schematic
deorients. These are rivers that you can't see here. You can't
see these three rivers, St. Lawrence Rivers in here. This is
mostly urban areas. Matter of fact all of it is urban areas.
See a lot of (garble) very strong returns will respond to streets
which are parallel to the flight track, therefore the signal
coming from the Shuttle will bounce on the surface, hit tie side
of the (garble) and get it back straight to you. It's like a
coronary reflector which shines straight back at you. These
cultivation fields here, the reason you see the different cones
in the different field is either some of them are cultivated and

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 10

some of them are not or there is different type of vegetation or
different stage of growth of vegetation. As intent one of those
objectives with this experiment is when we combined all
observation taken during the period of the Shuttle flight at the
different angles were going to see how well we can determine very
specifically for each one of these fields, what cultivation is in
it and what is the status of that cultivation. You know, growth
wise. And coming to the right here you see some of these bright
lines that correspond some of the rows between the different
cultivation field and I'm not familiar with that area but most
likely here you have specific farm buildings all along the road
here. That's a river I've already showed you. You see the
bridges across the river as well as you see them here and you see
the lakes in this area. Here, the rest of this area is most
likely forested region, not as extensively cultivated as you see
in this area. And things borderd between the U.S. is kind of
somewhere in this area here.

KUKOWSKI Okay, we're going to go to Ottawa now for questions
and then we'll come back. Ottawa go ahead.

Piere Kotif (Telemedia) It's about the Canadian experiment
with four separate studies and (garble) special photographs of
Canada have been taken. Among these were photographs of crater
forms over the centuries by mature (garble) and (garble) Ontario
and (garble) Quebec. Other than identifing the exact age of the
geological formation, where do your practical (garble) to these
experiments lead to?

DR. ELACHI The main objective of looking at what the signatures
of craters on the surface are using the radar was your related in
the future to the Venus radar mapper data to be acquired there on
Venus. As you know we have very little information about Venus
in the visual mode or must know information that completely cloud
cover. The Venus radar mapper mission to be launched in '88 will
be mapping of whole planet and the idea here is to have something
similar on FJarth such as greater so we can compare the signatures
on both planets. That was a major objective for that experiment.

What did we get?

DR. ELACHI If we acquired it. Yes, we had (garble) if I recall
eight passes planned Cor greater. We have acquired so far two of
those passes. We haven't processed the images to be able you
know to see what we're seeing on them.

KUKOWSKI Okay, we'll come back here now to JSC . I understand
we have no questions from the Cape so lets go back to that young
man there.

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 11

DAN DOOGA (Broadcast News) I hate to be a pain but on this
photograph the question was brought up about aerial photography
and what difference it makes between why up there like
vegetation, it doesn't seem to be a very good reason - you can
tell vegetation by asking I suppose. What are the practical
aspects of - what is this telling you that an airplane won't tell
you .

DR. ELACHI Okay, if you have to go and ask (garble) a 100
million people around the world basically what they are doing in
their cultivation fields so the idea here is in a snapshot. This
took about probably three or four seconds tc acquire. So in a
snapshot if you extend this on a global coverage the argument
objective, you have a free flying satellite or a space station
satellite with such a sensor you can do almost global monitoring
on a weekly basis and get global all around the Earth. How what
the extent of the cultivation, what's the stage of growth with
the cultivation, what's the type of cultivation.

DOOGA So you could tell where marijuana is growing in
California then if law inforcement wanted to know. That would be
a practical application.

DR. ELACHI I guess. I don't know what the radar signal is of
marijuana yet.

DOOGA But one expects that one would work on it. Would that be
fair to say?

DR. ELACHI It not in my scientific plans but I don't know, but
conceptually yes. Ultimate ideas is to determine what type of
vegetation most manmade or natural vegetation and basically have
the capability to determine you know, relatively quickly in our
global basis. What's basically our environment than what's on
the surface.

KUKOWSKI Alright we have a question from the gentlemen in the
blue shirt.

BOB PATERSON (News Radio) Dr. Elachi, what type of flexibility
is built into the future plans of this system and getting it
aboard the Shuttle in view of its tight scheduling no'., up to
1989?

DR. ELACHI Well, in principal, it's not the question of the
sensor itself you can fly it every four or five months because
there is no (garble) in the sensory. Once it is integrated in
the flight and operates successfully as was the case here. You
can refly it in fact every four to six months. It's only
question of finding time on the Shuttle you know of course the
funding which goes with it.

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 12

PATERSON A follow up question to that. What about your
customers who may ask for this information and view of their
priority or reasoning in the cost? Can they get that information
processed more rapidly than Landsat?

DR. ELACHI The more - well what we are hoping to do is the
processing of data acquired in this mission so now we have about
four hours that will roughly take about six months to a year to
do the final processing, doing survey processing could be done
probably I would say in about one month to two months. Again
keep in mind that about eight hours of data collected that's
about mappings of the whole United States. It's an extensive
amount of data you know to do and that's what keeps the team busy
for many years.

FRANK GREENWALT (Los Angeles Daily News) The figure you gave
us for digital collection I assume that is including the tapes
that we heard back to earth and not dumped.

DR. ELACHI That's correct.

GREENWALT And also I guess it's too early to have any real
findings from the dumps that you have had so far. You have the
early in ones.

DR. ELACHI Yes, as they said, we're spending most of our time
basically doing some processing to assess the quality of the
imagery and that person (garble) exceeds my hope on doing this
quick processing turnaround and then doing all (garble) planning
that is basically consummed our time almost 100 percent.

GREENWALT And one other question. I assume that the motions
are pretty low during the time when people thought you just had
two hours forty minutes. How would you characterize the motions
now among the investigators.

DR. ELACHI Let me tell you. When I saw this imagery here I was
uplifted a lot you know. It was probably the best news I had in
two days. Other, I think, things were looking pretty grim when
we found that the TDRSS link was not operating well on the first
day. And other very uplifting part was when the astronauts were
able to fix its own antenna and being able to maneuver the
Shuttle and do our first dump because that gave us an indication
that we'll be able at least to get that series of data take
through the rest of the mission. So we're pretty much uplifted
of course we'd have hope to get all the nominal mission but then
the presence of (garble) already happens.

PAUL RECER (Associated Press) To carry your statement a little
bit further about global modeling I'm sure that terminology has
great significance to you but not everybody and could you kind of
help us along here. What are you talking about? A precise week

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 13

by week crop estimates or detecting forest infestations more
rapidly or what are some of the practical {garble).

DR. ELACHI Okay, let me give you like one example related to
the forest station. There is a lot of concern on our - what is
the extent of the forest station in tropical regions and being
able to continue on a yearly basis keep track of how much percent
of the tropical forest are being deforested. It is an extremely
hard problem because they are not very assessible areas and when
you try to monitor them from airplane or from Landsat, most of
those areas most of the time cloud cover. So you have very
limited capabilities observing from a global basis. Well
observed on some previous radar experiment from space, as we will
be able to (garble) very accurately which area are the forest and
which areas are not. So one potential example in the future, if
you can do a flight or a coverage every year and do a global map
of the tropical forest, you can keep basically (garble) about how
much percent (garble). And that has significant impact relative
to exchange carbon dioxide between the atmosphere and the
surface. That's one example.

RECER Can you also survey crops and the types of crops -

DR. ELACHI Yes, crops would be of the same sort.

RECER Okay, I can see where this information might be of some
value to commodity traders. How is this information - once you
have your system going and you have your global modeling
underway, how is this information to be released?

DR. ELACHI Okay, (garble) my good feelings that's at least near
downstream to be able to do that in an natural fashion. Now
Landsat does reasonably a successful job on classifing
vegetation. The unique additional features of the radar will
(garble) to add additional error if you want or (garble) in
Landsat by adding radar data to Landsat data and also being able
to do it when you have cloud cover over an extended period of
time. That (garble) observed, cannot see those changes and by
putting those images into combination with it, it will allow us
to keep track as time series are changing. The best thing that
probably you say eight to ten years though.

JERRY HAN I FAN (Time Magazine) Thank you. This really appears
to be (garble) to Paul's question. It was simply to ask you when
is this material within an interpretation of hydrology, landform,
geology, going into some kind of public bin, library such as we
had tor Landsat out at Sin Falls?

DR. ELACHI All the data that will be acquired during this
mission will be processed and put into the public domain in about
six months from now. That's roughly the time, about six
months. That's roughly the time it will take us to do the

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 14

processing have a first look at it. Then we will be spending
basically the team will be spending the next two years doing
detail analysis and correlation between this data and all the
field work that is being conducted at the present time.

KUKOWSKI We have time for a few more questions here, Craig
Covault .

CRAIG COVAULT (Aviation Week) A couple of questions,
Charles. When you look at the river there outside Montreal are
those bright spots ships?

DR. ELACHI (Garble) looking at them, that's very possible.
That's very likely. Usually they show at a very bright point.

COVAULT Over all you've had what several hundred or couple
hundred people deployed around the world many with receivers on
the ground who are receiving data at the bird comes over, can you
relate a story or two where they've called in and either been
elated with data or called in and said where were you at.

DR. ELACHI Yes, we've been having the phone ringing all the
time. Yes one of the biggest exciting part was the two, one of
the penetration experiment, is that one was one of our hardest
experiments and lot of excitement so it's small story on it. The
people who recorded that data actually recorded it on a video
recorder and made a little sound, make it sound like acoustics
sound and played it back on the phone for us so you could hear
the radar sound coming in very weak all of a sudden when I showed
you that big peak you know, coming up very high then coming very
(garble) so that was a very exciting time and all of these were
done by then transmitting those messages on the computers to the
vax computer at JPL which we have contact with warning us that
they are going to be calling us in five or ten minutes and get
everybody ready. The other exciting one was we received data on
the ground was by a team from (garble) it was one of the team
members Ulaby and they also received them - in this chart I
showed you here was data fact by them from the field straigt to
here. New •"the other one, another story is we also woke up a
couple of times, one was the investigator name of Richard in
Australia to tell him we were just passing over Sydney
successfully and (garble) the fact was coming back his Australian
investigator. So those piece of free (garble) of good news were
very exciting and very uplifting.

COVAULT How about bad news? Did anybody call in and say where
are you at?

DR. ELACHI Well we had a few bad news of course. We had
yesterday when we lost TDRSS. Just before we lost it we did
inform one of the team members to take off from the coast of
Chile flying to do some ocean investigation in southwestern Chile

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 15

and as soon as we found out that TDRSS was lost, the
communication, sent him a telex to cancel his flight. It was too
late. By the time he flew back he called us and said he was
really dissapointed because his aircraft flight was excellent and
they got excellent data but unfortunately we were not able to
acquire our lead. It is a mixture of happy stories and sad
stories .

KUKOWSKI We have time for two more questions. Carlos Byars,
Houston Chronicle.

CARLOS BVARS (Houston Chronicle) Dr. Elachi, you said - you
showed us the material from the sensor that was buried seventy
centimeters deep. Were they all buried at a uniform depth or did
you have some at ten, twenty, thirty, and how deep down did you
go and still get data?

DR. ELACHI Okay, we had no different depths. As you said ten,
we had five receivers and the deepest one was at seventy
centimeters and that's the one we also picked from the deepest
one. We were expecting stronger signals in the bird receiver but
that there was relatively wet in comparison to what we have
reserved in the Sahara. So what we can do now is by taking these
numbers for the different depths and knowing the soil moisture in
that area we can determine perhaps what happened if the soil had
been drier in a week (garble) that's fairly accurate.

BYARS How do you think you'll be able to get penetration in a
dry area like the for example, the Sahara.

DR. ELACHI Okay, based if the (garble) Nevada in the seventy
centimeter I think we should be able tc observe like we saw in
SIR-A in the range of about two to six meters and very dry
environments such as the Sahara (garble).

KUKOWSKI Okay, I have an indication we have two more questions
to go so the young lady in the back and then we'll go to you Lee
and that'll wrap it up.

JULIET O'NEILL (Canadian Press) On specific antidotes I heard
two, in one case people who are dealing with oil slicks off Japan
and another one was Bangeldesh, what happened to those people?

DR. ELACHI Okay, on the one - I'll go with specific antidoes.
On the way related to Bangeldesh the plan was to collect to
passes early in the mission which unfortunately one of them was
not possible because of the delay in the ERBS deploy and the
other one was lost because of the TDRSS thing. We have one pass
coming in tomorrow and we hoped that we will be able to acquire
it and one pass was planned late in the mission which I don't
think we'll be able to acquire. So we'll be able to get that one

STS 41-G SCIENCE BRIEFING pllj 1:00 PM 10/09/84 PAGE 16

pass tomorrow. The Japan about the oil simulating oil spills
that's coming up tomorrow. Because in our plans to acquire it.

O'NEILL And could I just clarify - did you - was Montreal a
lucky stroke or did you want that particular area?

DR. ELACHI That depends on who I'm talking to. If I'm talking
to a Canadian I'll say it was a lucky stroke.

KUKOWSKI The last question from Lee.

LEE DYE (LA Times) Dr. Elachi, I'm not sure I followed exactly
what you had lost in terms of archeology early on. What are the
prospects in the Sahara and some of these other areas?

DR. ELACHI Okay, let me give you a summary on that experiment
because it's fairly important one. I would say about fifty
percent of our plan coverage for Egypt we'll be able to
acquire. We are planning about eight or nine passes and I'll
think we'll get at least four or five of them. The coverage over
the Rift Valley I think out of the four will be acquiring
three. And we have one pass over the (garble) area but
unfortunately I think we'll miss the side the (garble) so that
one unfortunately I don't think we'll be able to acquire. Two
other ones, we'll have one pass over the great Indian desert. We
are planning two passes, we'll acquire one. We're planning four
passes over Peru and so far we have acquired one. And there is
likely we'll acquire a second one. So that's kind of quickly the
summary for that type of (garble).

DYE Could I just follow up quickly on that. Is there one
particular thing you hope to see in any of these archeological
things (garble ) .

DR. ELACHI Okay, the main one - the two major ones that we are
hoping for is to map more extensively the all drainages in the
Sahara desert more extensively than what we saw in SIR-A and also
to see to what extent over the Rift Valley area (garble) to Lake
(garble) is the kind of information we get will be helpful to our
archeological investigations being conducted in that area.

KUKOWSKI Okay, thank you gentlemen, Bruton Schardt, Mark
Settle, Charles Elachi. A reminder, we'll have the images
available as soon as the courier gets here and I haven't seen any
signals yet. We'll also have some image - an image tomorrow and
we'll have additional images either Thursday or Friday. So thank
you very much for attending the briefing.

END OF TAPE

STS 41-G CHANGE-OF-SHI FT BRIEFING 10/10/84 11:45 a.m. Page 1

PAO Good morning and welcome back here again to talk

about his shift and answer your questions is Flight Director
Cleon Lacefield.

LACEFIELD We've had a very productive shift this morning. We
did an RCS trim burn. We're now in a 120 by 119 orbit. The trim
burn was 5 ft/sec. During the trim burn, we did not see any
movement of the Ku-band antenna and we have been able to point at
TDRS two times this morning, so everything went fine as far as
the RCS and the Ku-band antenna. We had a good waste dump this
morning so we're in excellent shape and we don't plan to do
another waste dump until flight day 8. We started our cabin 10.2
prep for the EVA tomorrow and we had some TV on rev 83 or 84 of
the crew during the prebreathe. The crew was going to checkout
their spacesuits this afternoon. They've already checked out EMU
3 and it was is good shape. Sally has completed the IFM that
connects the power to drive the locking pins on the Ku-band
antenna for tomorrow's EVA. She completed it in under two hours
and she said that it was pretty easy for her to do. She didn't
have much trouble doing that. It was easy for her to pull the
panel and the volume B to disconnect the locker. The EVA is
scheduled tomorrow on flight day 7. We plan to do the ORS
transfer and then if we have problem latching the SIR-B antenna,
the crewman will go over and press down on the SIR-B antenna and
lock it. Those first couple of items will be live TV through
TDRS, by the Ku-band antenna. After that time when they go to
work on the Ku-band antenna, then we'll go off the live TV. What
we plan to do is rotate the Ku-band antenna back in and the
crewman will go out and try to line up the gimbal axes so that
the inside crewman can go ahead and lock the gimbals. We have
completed our FES checkout part 2. All the avionics are looking
good for entry. Our flight day 5 experiment status, this is
yesterday's experiment status, file, we completed 75 percent;
maps, we completed 62 percent; LFC, 105 percent; and SIR-B was 47
percent. We are planning another stow test for the SIR-B antenna
this afternoon and depending on how that comes out will determine
whether we leave the SIR-B stowed or not, after the EVA. We have
dumped two tapes by TRDS this morning and we plan three more
dumps for the SIR-B this afternoon. And we plan to have TV on
rev 86 of the EMU checkout. For everyone that's following the
weather, tropical storm Josephine has turned into a hurricane.
It is approximately 450 miles off the coast of Florida and the
cloud layer has a diameter of around 600 miles. So it's a couple
of hundred miles off the coast of Florida, the start of the cloud
band. We have received some updates from the U.S. Air Force
weather service and they are saying that they are expecting the
hurricane to intensify overnight to 80 knots gusting to 95 knots
tomorrow. They're still forecasting the storm to move northwest,
the steering currents are very small. The storm's moving at four
to five knots. So, we still aren't sure whether we're going to
miss the Cape or if it's going to go north. The one thing in our

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 2

favor is the high pressure band is breaking down, which is what
was preventing it from wanting to go north, so we might be in
luck there. And we're sticking with our normal plan of the EVA
on flight day 7, or our revised plan, EVA on flight day 7, stow
everything and do finish up the ORS on Friday and come in on
Saturday. And with that I'm ready for questions.

PAO Okay, Mike Meechem, from Gannett.

MEECHAM Can you tell us exactly when you're going - CDT

times and when you're going to go out on the EVA to leave the
airlock? Do have those kinds of times?

PAO Yeh, I think they're in the execute package that...

MEECHAM So it's still the same 12:25 is

PAO Yes.

MEECHAM Okay. And how long do you think, we had originally

been told about three-hour EVA, what is it going to be now?

LACEFIELD We're still planning three hours.

PAO Carlos Byars from the Chronicle.

BYARS Okay, when you say you're sticking with the plan

for the EVA tomorrow, stow Friday, land Saturday. I take it
that's the landing is still subject to revision.

LACEFIELD The current flight rules say that if KSC, when we
come up for deorbit on Saturday, if KSC looks like it will be
acceptable the next day, we'll stay up on orbit and wait to come
down the next day. If KSC is not acceptable, forecast acceptable
on Sunday, then we'll go ahead and land at Edwards on Saturday.

BYARS So, we're not going to know about the wave off

then, in other words, it really becomes a wave-off situation.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 3

LACEFIELD That's right. And we'll be following the weather

all the way up until the wave-off decision is made, if it is
made .

PAO Frank Greenwalt, the Daily News in Los Angeles.

GREENWALT Yes, what was the rationale for keeping the EVA as
scheduled on Thursday. Is it because the weather in Florida is
changing so rapidly that you believe that it might be good on
Saturday and bad on Sunday or something, or what?

LACEFIELD The EVA, we've had it scheduled on Thursday since
we postponed it two days ago because of the SIR-B.

GREENWALT There was some talk over delaying the EVA 24 hours
if the landing was delayed 24 hours. At least that's what I
heard over the air-to-ground during the wrap up discussion.

LACEFIELD That was one consideration that we were looking at
and you're right, the reason we can't we decided to divorce EVA
from the landing is because the weather is changing fast and the
weatherman is not able to tell us whether we're going to be able
to come in on the into mission plus one day. And so we're going
to go back to our old flight rules that say, if it's not good on
end of mission plus one, then we're going to go ahead and go to
our backup site which is Edwards.

GREENWALT So, that gives you more flexibility, that you
believe you need?

LACEFIELD It gets us back to where we have always been where
we're going for a nominal end of mission and it gives us two
extension days for weather, which is the way we always fly
flights .

GREENWALT And your fuelants, consumables...

LACEFIELD Is excellent.

GREENWALT

How many days do you have of that.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 4

LACEFIELD It looks like right now on the consumables, the 02
and the H2, we have three days. And RCS is good for two days,
depending on how we do the deorbits.

GREENWALT That's two days beyond.

LACEFIELD It's the regular nominal end of mission plus two
days .

GREENWALT Thank you.

PAO Frank Seltzer from CNN.

SELTZER On the EVA, have yo figured out exactly what your

backup is going to be for the Ku-band? Yesterday, Pinky was
playing with the sleeping bag and there was also the talk about
stowing it somewhere, just taking the whole unit off and then
stowing it somewhere in the cargo bay. What are you're
options? Are they going to be taking a sleeping bags out with
them?

LACEFIELD Right now they're still talking about whether the
sleeping bag will go out. The plan still has the sleeping bag
going out but they are still evaluating that. The plan for the
EVA is to go ahead and try to have the crewman to try move
antenna and go ahead and lock it. If that doesn't work, they're
looking at ways, and if they can't lock it, they've got several
ways they can tie the antenna down, so that it won't move. And
they're using some tethers to do that. They did find a place
back by the ORS on the MPESS, so that if they did go ahead and
sever the antenna, they could go ahead and stow it back on the
MPESS. And that procedure seemed to work pretty good in the
water tank.

SELTZER When are you going to make the decision on what the

back-up procedure will be should you not be able to pin it so
they don't bring out like 1500 things with them.

LACEFIELD If they can move it and not pin it, then we'll just
go ahead and tie it down.

PAO

Paul Recer, Associated Press.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 5

RECER There's still a little confusion regarding why it

was necessary to restore power to one axis of this Ku-band
antenna if you can move it so easily by hand, as was told us
early.

LACEFIELD We are not enabling power to the gimbals, what
we're doing is enabling power to those locking pins to drive them
in while the crew lines up the antenna. Those locking pins are
what holds it in place when the crew aligns it, so it'll be
locked for entry. That's all we're enabling. We are not
enabling the alpha or beta gimbal axes.

RECER Okay, and there's some sort of power system that

drives these pins in?

LACEFIELD Yes.

RECER Okay.

LACEFIELD And what we have done is we've kind of hot wired
those pins with this IFM procedure. We've wired those two pins
but we have not wired the beta or alpha gimbals motors.

RECER Okay and I relize the pins are power driven but

what triggers them to snap into place? When they line up?

LACEFIELD Yes. All we'll do is, they're just sitting like
this and you're looking for a wedge to drive into a slot and what
that crewmen are going to do is they're just going to line it up
like this, and they're just gong to bump in down in one second
intervals, like this, then when they get it all lined up they can
just pump it all the way in

RECER Okay, and that wedge is driven by power?

LACEFIELD Yes , electrical power.

RECER Ar.d all they have to do is line up and it does it

automatically .

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 6

LACEFIELD And the crewman inside the bird will be working the
switch to drive it in when the crewman outside the bird says,
"Okay, it's lined up, go ahead."

RECER Okay, and who will be the crewman inside the bird?

LACEFIELD I'm not sure who's going to be throwing the power,
right now. I had not thought about asking about that.

RECER

Have you all tested that power circuit.

LACEFIELD The power circuit, the IFM is complete and looks
great .

PAO Your name and affiliation, please.

BROAD Bill Broad, the New York Times. I'm confused about

what Sally did then. She restored power to these pins and had
that power been accidentally cut before during the severing
operation for the gimbals?

LACEFIELD Right, remember when we pulled tht plug to
disconnect power to the gimbals? That plug also powered those
little pins.

BROAD It's the same plug?

LACEFIELD Yes. So, all we're doing is hot wiring the pins
that drive the locking pins and not the beta and alpha gimbals.

BROAD I see, otherwise the beta gimbal would start doing

its act again. How did they hot wire that? Did they get up
there with soldering irons?

LACEFIELD No, we have some cables and we just hooked it on to
that pin.

PAO Rebecca Chase, ABC.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 7

CHASE I'm not sure I fully understand the decision that

you'll be making on landing. Can you explain a little bit more
what the window is and what are the factors you take into
consideration?

LACEFIELD Okay, on the nominal end of mission, we have two
opportunities into the Cape, on revs 132 and 133 and then we have
a backup opportunity to Edwards. So, we have two tries to get
into the Cape and then we have a third try that we can go to
Edwards. On the two tries that we go to the Cape, if the weather
is not acceptable at the time that we're going to give the go
from the MCC for the deorbit burn, then we just go around another
rev and wait for it to be go. Okay? Now, if the weather is
totally unacceptable, you know, if we've got a hurrican sitting
over the Cape, I mean we are talking about just going to Edwards
there is no wave off and a wave off and then go into Edwards.
We'll just set up and we'll go into Edwards on the first try.

CHASE But , it ... .

LACEFIELD Now, if the weather is, let's say the weather is
not acceptable on those two passes into the Cape and we look and
we ask the weatherman to say okay is the forecast weather
tomorrow going to be acceptable? He says yes and we'll stay up
on orbit one day and try again the next day. Now, on that day,
if it's not acceptable, we'll just go to Edwards. We don't wave
off a second time to go to the Cape, we just wave off the one
day .

CHASE But, you don't have those three opportunities on

the second day?

LACEFIELD Yes, we do. On the second day end of mission plus
one, we have again two opportunities into the Cape and one to
Edwards and it's the same on end of mission plus two, two and
one .

CHASE So, at this point you're planning to attempt a

Saturday landing, take a look-see and see and if it looks like
Sunday would be better, you'll stay up there until Sunday.

LACEFIELD That's right.

CHASE

And come back and try again.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 8
LACEFIELD That's right.

CHASE Wire copy this morning was saying a statement was

issued out of NASA at the Cape that the hurricane was no longer
considered a threat. Is that correct?

LACEFIELD I'm not sure if it's considered a threat to the

Cape, that would be something for Miami's weather service to tell
us .

CHASE You mean NASA folks don't coordinate your

statements then, huh?

PAO Well, we do but what's a threat to the Cape and

what's a threat to the landing....

LACEFIELD There's a big difference between acceptable landing
weather for the Shuttle and trying to blow the VAB in.

PAO Your name and affiliation. And did you have

something Jim?

MEDIA Do I understand you correctly that the EVA is not

being lengthened? The amount of time they'll be out?

LACEFIELD The original EVA was 2 1/2 hours. We expect to add

a half hour to that, which is the Ku-band antenna. So it'll be

three hours total which is a little longer than originally
planned.

MEDIA Are you cutting anything out of ORS work or...?

LACEFIELD No.

MEDIA or speeding it up in any way?

LACEFIELD No.

PAO

Carlos Byars from the Chronicle.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 9

BYARS Can you tell us any more about this loose wire that

the crew seems to have spied out there dangling around tht
gimbal?

LACEFIELD One of the things that Crippen reported yesterday
was this loose wire. We have not been able to look t it on TV or
get a picture of it yet, but that could be part of the problem
with why the beta gimbal isn't driving because the wire that is
supposed to drive that is not connected. That could be our
problem. And we haven't been able to substantiate that.

BYARS I understand that they have checked to see whether

they backed off, doesn't that thing wrap itself, the cable wrap
around that gimbal as the antenna turns and have they
substantiated that they did in fact unwind it?

LACEFIELD They did do the cable unwrap routine that morning,
but then we had the problem with the antenna. So, the two could
be linked.

BYARS In other words, during the cable unwrap process it

could' ve snagged on something.

LACEFIELD That's right.

PAO Mike Meecham from Gannett.

MEECHAM As I understand the ORS transfer, that should take

about an hour if everything goes well?

LACEFIELD That's right, we're planning a transfer through
what the EVA fitting into tank two and then we're going to
transfer bsck into tank one, so for landing, we'll have
everything back in tank one.

MEECHAM No, I don't mean the actual fuel transfer, I mean

days work out there with tools that procedure should take about
an hour if everything goes well?

LACEFIELD Yes, right.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 10

MEECHAM Will they both translate down on the same side of

the ship? Will Kathy go one side and Dave the other? How does
that work?

LACEFIELD Dave goes down to the ORS and gets everything set
up. Kathy goes over and picks up the tools and then she comes
down .

MEECHAM
know that?

Are they starboard, portside of the ship, do you

LACEFIELD I know they come, I know, I think Dave comes down
the opposite side of the SIR-B antenna which is on the starboard,
left side, oort side. I'm not sure which side Kathy comes
down. I think she comes down the port side also, but we can
check on that for you.

MEECHAM And did I understand you to say that if you're

getting joy on closing of the antenna and it looks like the
latches are working well, and if you get, if you can see that it
is, that the Ku-band is closing properly as far as the pins, that
you may decide then to just go ahead and redeploy so that SIR-B
can get an extra day?

LACEFIELD

We will reevaluate that, that's right

MEECHAM

So, it's possible that you'll.

LACEFIELD

It is possible,

MEECHAM

...to go ahead with the additional data SIR-B.

LACEFIELD That's right and with the Ku-band antenna pinned,
we can still point it, but we would have to go through a pointing
procedure again. There is no interference.

MEECHAM Regardless of what happens, you're going to pin

that antenna, is what the intent is?

LACEFIELD That's right.

STS 41-G CHANGE-OF-SHI FT BRIEFING 10/10/84 11:45 a.m. Page 11

MEECHAM And then you'll just reconfigure so that you point

the ship and transmit.

LACEFIELD That's right, we'll have to find another pointing
angle .

PAO Take one more question here and then go to Kennedy,

Frank Seltzer from CNN.

SELTZER One question and it's a followup, Cleon, just to

clarify what you were telling Mike, on the SIR-E are you going to
wait until the test today or until tomorrow's closure right
before the EVA to decide whether or not, you're going to reopen
the SIR-B?

LACEFIELD We're going to do the test today and then if that
looks good then we'll be considering to redeploy the SIR-B. But,
if we come on tomorrow and have problems with this new procedure
that we're going to try today, then it would be no/go again and
we'd leave it stowed.

SELTZER Tomorrow will be the actual decision after you go

to stow tomorrow will be the key one?

LACEFIELD That's right.

MEECHAM Okay, second question, you did the IMU, Sally, did

that to get ready for powering up tomorrow. Now, is that area
still torn up for tonight or did she put it back? Did you have
her set up for today and is it going to stay overnight? Or is
she going to begin tomorrow?

LACEFIELD Actually, she didn't have to tear up that much, I
don't know if you... The IFM has changed since the first time
we went through this when we thought we were going to be pulling
cabinets and stuff. If you look at it, we had a storage space on
the side here called volume B. All they had to do was pull a
couple a of pins, and move that off to the side. And then they
were able to pull that cover over the top of the lockers and the
top of storage volume B. And pull that cover off and then they
could get back there and do the changeout with the plug. So, all
they had to really remove was that cover that was sitting over
the top. So, they don't really have anything in the way.

fa

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 12

Volume B is still off over to the side, they just moved it over
about 2 in. It is still in that space and they just moved it out
enough so they could remove the screws that were behind it.

HEECHAM Okay, I had the feeling that they had pulled the

volume B out, I didn't realize it was just only a couple inches
over .

LACEFIELD Right, we didn't pull it all the way out of that
space, we just moved it over. And then she got to the screws
behind it. So, there's nothing big in the way like a big storage
volume in the way.

PAO Now to Kennedy Space Center, Flor\da.

BARNABY Jay Barnaby with NBC. Mr. Lacefield, let me see if

I have this landing sequence nailed down the way you've been
giving it to us. Ignoring effects from hurricane Josephine here
at the Cape on Saturday, you would bypass your two opportunities
here and if the weatherman says, "Hey, we're going to have a good
day on Sunday," then you would wait a day and come in here
Sunday. If not, then you would go into Edwards Air Force base on
Saturday and if you don't get in here on Sunday, you will not
wait until Monday, you will go ahead into Edwards, anyway. Is
that correct?

LACEFIELD That's correct.

HiNES On the EVA, as I understand it, Leetsma is going to

be the plumber and Sullivan is going to be his helper. Who is
going to be in the leading and supporting roles on the Ku-band
antenna stowage?

LACEFIELD At the present time they are still working that
issue and I don't know who've they decided on to actually do the
moving of the antenna yet. They have not really decided. When
Pinky was talking up yesterday and briefing the crew on it, he
was talking primarily to Dave Leetsma. Dave was the one that was
doing all of the answering of the questions. So, but I'm not
sure that Dave is going to be the one that is actually doing the
antenna movement, but they're going do some more talking with the
crew this afternoon. So, we should know that here by this
evening .

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 13

HINES Aren't you going to get into a lot o£ trouble with

the National Organization of Women unless you let Kathy do
something spectacular, too?

LACEFIELD She's going to close the SIR-B antenna.

ROSENTHAL Two questions, please. How much force does it take

to move the Ku-band antenna into the position where the pins can
be driven in?

LACEFIELD The antenna is very easy to move. If you were
going to move it, you could move it very easily with one hand. A
zero g crewman, if nothing is binding up, would have no problem
at all moving the antenna. It's extremely, very small, one to
two pounds force, max.

ROSENTHAL And I'm a little embarassed to ask this after this
many EVA's, but will you please tell us why they prebreathe 26
hours or so ahead of going out, why it isn't done just before?

LACEFIELD What we're trying to do is make sure that we don't
have nitrogen in the blood when we go in, you know, when they go
to the decreased pressure in the suits. And that's a standard
procedure you do to avoid bends.

PAO I think he's wondering why we have two prebreathes.

LACEFIELD We have one prebreathe that we go and breathe pure
oxyoen. That's a flush of the system right off the bat. And
then when you decrease the cabin pressure, your partial pressure
nitrogen in the system is lower and then you can go ahead and
purge the nitrogen from your system faster.

ROSENTHAL But, doesn't going back into the cabin environment

bring the nitrogen back into the system?

LACEFIELD But, remember, we've decreased the cabin pressure,

so that your partial pressure of nitrogen in your system is
less. So your overall nitrogen content in your blood is lower.

HOTZ Robert Lee Hotz from the Atlanta Constitution. I

just would like you to clarify something. For some weeks now,

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 14

NASA has been talking about this EVA, the three-hour EVA to do
the Orbiter refueling demonstration. On Tuesday, after it was
formally postponed, it was formally lengthened to a four-hour
EVA, now it's a three-hour EVA again with 2 1/2 hours devoted to
the refueling work with a half an hour devoted to whatever
antenna stowing is necessary, I'm just confused by that, those
times. Is some work been dropped? Was there originally some
buffer time built into that EVA? Can you clarify this?

LACEFIELD The estimates that we're giving you, we're trying
to be very realistic with how long we think the EVA will take and
even the two hours for the ORS transfer does give L.ie crew some
time to react to any problems that they may come up with. There
is some buffer time in the 2 1/2 hours.

FLAKUS This is Greg Flakus from the Voice of America. If

you do decide to extend the mission by one day, because of
weather at the Cape, what will the crewmembers do during that
day. Will there be some extra work that they could perform?

LACEFIELD We have a whole shopping list of items that we can
keep the crew busy with. There's a lot of DTO's and stuff that
we have on shopping lists such that if we have an extension day,
we can have the crew do those items.

KSC That's all we have from KSC.

PAO Okay, back here in Houston, again, Paul, did you

still have something? Paul Recer, j

RECER Two questions. What are the issues under

consideration to determine which crewmen manipulates the Ku
antenna.

LACEFIELD That would be a good question for John when he
comes off, because he's negotiating that right now.

/

RECER What is the weather at Edwards?

J

LACEFIELD It's beautiful.

RECER

You expect it to be...

STS 41-G CHANG E-OF- SHI FT BRIEFING 10/10/84 11:45 a.m. Page 15

LACEFIELD And it's a, there's a weak front going through
there on Saturday and they're expecting the winds to pick up a
little bit on Sunday but it's still acceptable. No clouds,
rain. It's looking good.

No

PAO Dave Jackson from Time.

JACKSON I want to go through this SIR-B option again. You

said you were going to run through, check with it tomorrow. Does
that involve trying to fold it shut and see if it will fold shut.

LACEFIELD They have come up with a new procedure on driving
it shut for six seconds to see if they can get it preloaded
enough so that when they bring over the outer leaf it'll mate.
That procedure is what they're going to try this afternoon. The
procedure that they've got right now isn't working too well, as
you're aware of. So, if this procedure works, then they think
they'll have it licked so that when they come up for tomorrow
they won't have a problem. They can demonstrate that the antenna
is working like it should be.

JACKSON If it does work then you, it is a good possibility

you're going to redeploy it after the EVA.

LACEFIELD That's right.

JACKSON And leave it open for as long as...

LACEFIELD We will reconsider that issue.

JACKSON Now, if you find then that it won't shut again,

even though it did work before, would you consider again using
the RMS to tap it shut?

LACEFIELD That's right.

PAO Frank Greenwalt from the Daily News in Los Angeles.

GREENWALT The wire, the loose wire that may be loose, are you
going to do anything with that at all before you get back to
Earth .

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 16

LACEFIELD We aren't planning to do anything with that wire
and it is no hazard where it is at.

GREENWALT And I suppose I should ask a what-if question.
What if something goes wrong with the suits before the EVA.

LACEFIELD We do have a backup suit.

GREENWALT Well, the worst case scenario, if the suits don't
work at all for some reason, Murphy's Law comes up again, is
there anything that really bad that would happen, aside from
banging the Ku antenna around on landing and possibly damaging
the SIR-B antenna?

LACEFIELD Well, we believe that we can close the SIR-B
antenna because we have the backup with the arm and then we still
have the pyro stow. As far as the Ku-band antenna, if we look at
it and when we get it in the stow, we believe that we can close
the doors, we don't have a gimbal problem and we can close the
doors and we're okay then that's what we'll do, if we couldn't do
an EVA. If we're worried about that, we will go ahead and sever
to antenna.

PAO Okay, Rebecca Chase.

CHASE On the television pictures this morning, we heard

Kathy say to tell John Cox she was pedaling as fast she could,
can you share with us what that means.

LACEFIELD John is going to share that with you at his press
conference .

PAO Jim Asker .

ASKER What would the sleeping bag cover be used for

again?

LACEFIELD The sleeping bag cover was to, if we couldn't put
the locking pins on the gimbal, what we were going to do is wrap
it around that part of the antenna so that it wouldn't slam up
against the, inside of the door, which is the radiator and cause
any damage.

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 17

ASKER So, is that the same as the tieing procedure that

you were . . .

LACEFIELD The tieing procedure is really, we take a tether on
one side and take it down to the bottom of the stress on the SIR-
B and then we tie the other one to the handhold.

ASKER I guess I'm still confused, would you then cover it

with. . .

LACEFIELD And then we are looking at, in addition to that,
covering it with a sleeping bag. But they are still working with
her, they want to put that sleeping bag in the airlock.

PAO Henry Cooper from the New Yorker.

COOPER Say that you decided to open up the SIR-B antenna

after the EVA and say that none of these methods of closing it
worked in the end. What would be the worst case, I mean what
damage would be done? Would the damage be just to the SIR-B
antenna, or would the damage be to the interior of th cargo bay
or what?

LACEFIELD I guess you could have some inside damage to the
doors which is where the radiators are, but primarily what you'd
do is you'd damage the SIR-B.

COOPER But, I mean wouldn't the SIR-B Pi's be delighted to

risk the damage to their antenna which can be fixed later,
rather, and get the extra day's worth of observations?

LACEFIELD But, we are not willing to risk the turnaround time
of what it would incur to the Orbiter if that was to go up and
hit those radiators. We're on a tight schedule.

PAO Anything further? Flight Director John Cox in the

Control Center advises that both the EVA crewmembers will be,
understand the IFM that goes on with the Ku-band antenna and both
are capable of doing it and it's going to be a crew call as to
who does what out there and the procedure that's going to be
uplinked is going to call for an EVA 1 and 2 crewmember
participation. So, the crew will decide between themselves, who
does that. I think if you flip a coin in zero g, you don't get

STS 41-G CHANGE-OF-SHIFT BRIEFING 10/10/84 11:45 a.m. Page 18

an answer. No, John didn't provide an answer to pedaling, but
you can sure pin him down later on and that wraps us up here and
thank you and thank you Cleon.

END OF TAPE

STS 41-G CHANGE-OF-SHIFT BRIEFING p!3j 7:4 C . PM 10/10/84 PAGE 1

PAO Good evening and welcome to a change-of -shi f t press

conference with John Cox, off-going orbit 2 flight director.
John, why don't you go ahead and summarize.

COX Okay, today we had a very nominal day. Everything

went very well, it's the day prior to EVA and all the suit
checks, the EMU checkouts, went absolutely perfect. The crew
reported nothing in the way of anomalies. In fact, we kept
trying to bait them just to get them to tell us anything about
how the checkout was going. It was completely nominal. They did
start the 10.2, 02 prebreathe this morning. That's typical the
way we do it on the flight plans. The payloads themselves have
been having another very good day. It looks like maps, file,
large format camera, and SIR-B are all going to be up in the 90
to 100 percent, probably all closer to 100 percent. We did try
another SIR-B antenna stow test today and did not improve the
results of the other day, but got everybody scratching their
heads on some interesting data that came back from it. The plan
of attack on SIR-B versus the EVA versus the Ku-band antenna is
kind of the same with different, a little bit different criteria
we're developing now. The basic plan is if SIR-B can't, if the
antenna can't be restowed, stowed redundantly, then we would go
ahead and require it stay stowed after the EVA. What we're going
to look at, as far as stow redundancy, is being updated a little
bit here and we're going to have Kathy inspect it when she's out
there to see whether the latches would capture on the pyro
system. There's a virtually redundant pyro system onboard the
SIR-B antenna if those latches will drive shut, well, it's just
one latch with two drives on it. If it'll drive shut, pull the
antenna down, we'll believe that the redundancy is there because
we've already demonstrated we can tap on it with the arm and use
the electric drives. The tap-it-with-the-arm makes the
microswitches , let's the electric latches go. As far as
consumables are concerned, we're in very good shape. We have end
of mission plus at least three almost four days of consumables,
so that doesn't seem like it's a problem. The weather though is
still cropping up to be an interesting item. It looks like
Edwards is going to be good probably through the weekend with
scattered or light type of cloud cover. Josephine continues to
move northward and it looks like winds and cloud cover are again
the concern, but it looks like it ought to be heading toward the
clearing type trend for the weekend. So, if we're lucky and keep
our fingers crossed, we may have a chance to sneak into the Cape
either Saturday or Sunday right now. It was easy. We wanted,
number one, to decouple this EVA from the weather decision, not
being able to predict which way to go so we went ahead and left
the EVA scheduled on the flight day 7 and intending to continue
in that manner. We had a successful supply water dump today. It
has us in great shape. We won't need another one while we're at
the 10.2. We'll return to 14.7 tomorrow after the EVA and we may

STS 41-G CHANGE-OP-SHIFT BRIEFING pl3j 10/10/84 7:45 p.m. PAGE 2

do a little tweak. We have one more waste dump. It'll be
scheduled the morning prior to entry and that'll be the last one
for the flight. Other items we picked up today. We had a tack
ends test that had been talked about preflight, where we turn all
the tack ends on in an auto mode and collect data. Ground teams
then look at the data and see if we could use some sort of an
algorithm to determine the Orbiter's state vector based upon that
tack end data. And they'll be off looking at that in the next
couple of days. We also ran a test on the failed jet R3R and if
confirmed at least the commands are getting out there. There |s
some other failure, possibly a mechanical valve jam or something
out there where the oxidizer valve isn't opening. On tomorrow's
activity, the EVA will be, the nominal EVA that we had originally
planned to do. And then as we get down toward the finish of that
EVA, we will pick up with an inspection of the SIR-B to see
whether it'll do the pyro stow function, and then we'll get on
with the Ku-band dish alignment and pin drive procedure. All in
all the EVA should run on the order of 3 to 3 1/2 hours and with
crew ingress thereafter. Once the Ku band activity begins, the
TV coverage through the TDRS will stop because we won't have that
Ku-band interface. After the EVA, we'll return the cabin to
14.7. We also have a potential opportunity for a trim burn there
and with that I'll be happy take any questions.

PATTERSON Bob Patterson, News Radio. First, I knew you liked
their arm, but we didn't think you'd fight over it.

COX We told you they could keep it as a tool kit item.

PATTERSON Trying to get a clearer explanation, here. We know
you want some form of redundancy so that you're sure that this
time that the SIR-B is not going to fail you when you need to
fold it up. Is Crippen concerned about the safety factor, having
Kathy Sullivan and Dave Leetsma out there as opposed to the
technical aspect of this?

COX No, he's not at all concerned safety-wise. He

would not like to see us inventing new procedures that don't have
the test of time to check them out, go back and do the
engineering work that we usually do when we develop a procedure
to make sure it works and that type of thing. He doesn't like,
that's just generic with any good crew and same with the flight
control teams, you don't like to change your procedures. You can
stay with the ones you know work. He would rather stay with the
ones he knows work and he feels confident that the latch is
getting down far enough, that the outer leaf is getting down far
enough for, the pyro function to work. And it's merely a fact

STS 41-G CHANGE-OF-SHI FT BRIEFING p!3j 10/10/84 7:45 p.m. PAGE 3

that we're just not quite getting to the microswitches that makes
the electrical one come up short. So, he feels he's got a
redundant system sitting right there now. We just have chosen
not to exercise it yet. And he also feels that the arm offers
some redundancy to that.

PATTERSON He mentioned something about the coding on the SIR-
B antenna seemed to be in the way of the previous problem of it
closing down.

COX Well, that's the thermal insulation that's on it

and that's the same thing I was commenting the other day. It may
still be, it's a wrapped type of thing and it has an outer
surface that is a little puffier than it might need to be. It
might have been outgassing probably earlier in the thing or just
might have laid compressed in one g and it just isn't showing up
as that compressible in zero g. Maybe, it's a little more rigid,
maybe the vacuum is doing that and it's just keeping it up a
little higher.

SELTZER Just want to double check with you, exactly, you

were talking about firing two of the pyros before. Once you fire
the pyro that's it, isn't it?

COX Well, we say pyros in this case and it probably it

makes people think in terms of separating things. That's not
really what's happening in this case. For each of the mechanical
functions that happens on the SIR-B antenna, be it the hinge
function that you have to rotate about to close the inner leaf,
or the hinge function that you have to rotate about to close the
outer leaf, or the tilt function, or the latch drive, there's a
dual redundant electrical way to make that function happen and a
dual redundant way, that we call the pyro way, where all you do
is burn a little wire and it releases a spring function. Now,
what we're talking about as far as the leaf drives, is there's
like a prewound spring sitting in there that will try to drive
the leaf closed as soon as you release a pin that's holding one
of the edges of that spring and it'll just slowly bring the leaf
around and close it down. The electrical function is still there
if you want it. You could turn around and drive back against
it. Okay? So, they were clever in the way that they designed
the system. There's a 100 in-lb they believe in the spring.
There's 130 in-lb worth of torque on the drive motors, so the
springs could drive the leaf shut if the motors had failed. But,
then if the motor works, it should be strong enough to drive the
leaf back open again. So, that's what we were talking about that
if we had the inner leaf down, and we helped push down harder on

STS 41-G CHANGE-OF-SHIFT BRIEFING pl3j 10/10/84 7:45 p.m. P^GE 4

the inner leaf by releasing one of the pyro springs, and ^ dn
drove the outer leaf down, and then helped push it down with one
of the pyro springs, there was the theory that was going around
in there that maybe that would work. That was the thing Crippen
reacted to since the tolerances were so close, he'd rather just
use the normal procedures, because he already believes that
they're going to work. And since we're not there and we can't
see that clearance, it's hard Cor us to make that judgement until
the crew actually goes out and inspects it.

SELTZER What kind of power do you have on the motor driving

it down for (garble), I know when Kathy was trying to push down
on it today, using the motors, and keeping them going for the
stow position, they were releasing pretty quickly. And the
latches weren't holding.

COX Well, there's a notch type function where there's a

little spring thing that, there's a spring and a ball and a
detent that rides around in a what we call the clutch. And
everytime you exceed 130 in-lb you then roll over to the next
knuckle. And what we were trying to do is preload it so it had
the max amount of torque before it released. We were asking her
to take several readings to see when it sprung back up again each
time. Turned out that the set of readings we got was pretty
inconclusive and they were wide variety, so we didn't come up
with a clear cut way of how to preload it to hold it down as
strong as we could. But, what we're talking about is getting
somewhere over 100 maybe 120 in-lb of push using the normal drive
system. And what the proposal was was to add another in-lb that
we knew about from the spring.

SELTZER On the EVA, on the storing of the Ku-band, are they

going to be taking the sleeping bag out with them?

COX We have it in the, on the message that went up, to

keep in the airlock. There's some analyses going on right now
and there's some open action out to Rockwell tell us whether
or not we need to. The theory is that the woys we've come up
with to stow the antenna. It looks like there's no way that the
dish itself, even if the lock pins don't work, there's no way
that the dish itself can come into contact with any structure.
So, if that we probably don't need the bag on it.

SELTZER

You'll decide in the morning.

STS 41-G CHANGE-OF-SHI FT BRIEFING pl3j 10/10/84 7:45 p.m. PAGE 5

COX Pardon.

SELTZER You'll decide in the morning.

COX Right. And it's probably just as easy to bring the

bag with them on the EVA/ just in case something comes up that we
hadn't expected at all. And it will turn out that it's going to
bang on something that we've got it there to use it. But, it
looks like we probably won't need it.

RECER What is Kathy going to be looking at, what

specifically will Kathy be looking for when she inspects the SIR-
B antenna?

COX On the outer leaf, it folds down and there's a

little latch, a plate, that falls down in front of the leaf, it
just rides with it, and there's two holes in that latch that are
both at the same level. And one of them is waiting for an
electrically driven latch to enter that hole and pull it down and
the other one is waiting for a pyro driven latch to go in and
pull it down. We can't drive the electrical one without those
microswitches making, so it sits there and wishes it could go and
it has motors that want to run but we can't get the power to
them, that we know we can release the pyro latch and let it go.
From where she's sitting, it's like maybe me looking down, oh
maybe to your knees or something like that, about that far away
from the aft windows down to where those latches actually are in
the cargo bay. And it's hard for her to see from the back
windows whether or not those latches would actually, as they
rotate, end up in the hole. So, what she's going to do is stick
her head around and look to see the pivot point of the latch and
trace the way she thinks it would drive and see whether it looks
like it would fit in that hole and pull it down, the pyro one.

RECER It's a judgement call, I mean.

COX It's a judgement one, but it ought to be pretty

clear. The holes are plenty big for the small end of the
latch. There's a lot of tolerance there. It's just while the
latches are back and not being driven, it's hard to see from the
cabin window because the latch is pulled all the way back, you
can't see where its travel is going to be. You can hardly see
the latch. You can just see a little bit of the shaft of it.

STS 41-G CHANGE-OF-SHIFT BRIEFING p!3j 7:45 PM 10/10/84 PAGE 6

RECER Okay, and if it is her judgement that the pyro

driven, released switches lever would engage, then that
establishes your redundancy.

COX Right, we have redundancy there in the system and

we have another redundant way using the arm to push down and make
the microswitches to let the electric system work.

RECER Now, who will do the manipulating of the Ku-band

antenna?

COX Both of them will be doing that. That's a two-

person job, it's just... The way Pinky Nelson and Jerry Ross did
that in the water tank, they both tried different positions and
Pinky found the one good place to view was from the side with
your feet toward the forward end of the vehicle, holding on to a
handrail along the door with your left hand and then holding the
electronics box with your right hand and you could see the latch
area or the place where the pins go in. Another good place was
laying up on top of the electronics assembly, kind of riding it
like a horse, but leaning way over, and so that you could also
see the pins and you could get a hand on the dish. Another place
they came up with was kind of inboard but there's no good place
to restrain yourself. You can hold onto a handhold and then the
electronic assembly for awhile, then when you need a little dish
motion, you can use one arm to try to move the dish. The trick
is we're going to have to rotate the dish in two degrees of
freedom. And so they're looking at, it'll take two people to
actually look and move and get the good view. So, all Pinky was
trying to describe was where the positions are and he'll offer
some more suggestions in real time, if they're having trouble
getting at something. That's just the way that they did in the
tank and they think that that might work alright.

RECER You mean one's going to move the dish and the other

is going to look and they'll be talking back and forth, "Yeh, you
got it at the right place."

COX Right.

RECER Okay, and once they have the pins, the ledge or

whatever it is lined up, then they send, they tell whoever is in
the cabin to go ahead and energize that circuit that drives the
pins .

STS 41-G CHANGE-OF-SHIFT BRIEFING pl3j 7:45 PM 10/10/84 PAGE 7

COX Right. And we plan to pulse it with small pulses

so you can watch the wedge coming into the notch and that helps
you line it up. Say okay, it's just a target thing, I see it
coming this way and then as it comes in, it'll center itself and
you wiggle a little bit to make sure it's in there solid.

RECER Okay, who will be throwing the switch on the

inside, do you know?

COX I don't know. It's probably a pretty good chance

that Sally would do it, because she was the one that installed
the IFM. At least, she's the one that gave us all the report of
how the IFM installation went. And you're actually bringing the
switch up to the, the cable all the way up to the flight deck and
then all you're going to do is turn utility power on and off in
those one-second bursts. I would guess she would be doing it
unless she's tied up using the arm to get camera view so that the
inside crew can see. If they can see alright outside the back
windows then probably fine, if they're wanting camera views from
the arm, then she may go ahead and do that. So, it's no way to
tell.

RECER Okay, and uh, I think we touched on this briefly in

an earlier briefing, but have Leetsma and Sullivan worked with
this particular, or with a model of this antenna before, I mean
are they familiar with the equipment?

COX No, they're not. They probably aren't familiar

with the electronics and the way it works probably to the extent
that we think Crippen probably is. That antenna was first flown,
I believe on flight 7, and that was his flight, and being a new
item, he probably went out and learned quite a bit about it. He
seems to have been the one that's been reporting the most
information about the antenna. He was the one who gave us the
idea that he thought there was a cable loose on it or whatnot,
the other night. So, I kind of think he's the guy that
understands it, and I'm sure they've been looking at camera
views, you know, the bay camera views, zoomed in on it. And
probably been a little bit of school taking place where all these
little things are. We sent up some pictures on the teleprinter
to try to give them an idea, that if they're looking at the real
antenna, they can get an idea of where these little drive
mechanisms are so they can try to locate them before they ever
even get out there. And then what Pinky suggested is when they
get over to do it that they just spend about 10 minutes just so,
looking at the mechanisms themselves to see if they can figure
out where everything is and everything that we'd mentioned in the
messages .

STS 41-G CHANGE-OF-SHIFT BRIEFING p!3j 7:45 PM 10/10/84 PAGE 8

RECER But the first time they've ever worked with the

thing, or touched it, or examined it closely, will be in space
during the spacewalk?

COX That's true. That's not to say they haven't

thought about it. This flight being high priority for the Ku-
band system and the high data rate SIR-B interface. We changed
the flight rules for this flight to say that we'd be willing to
leave the Ku-band system out in a deployed configuration, if we
had lost one of the deploy stow motors. Then you're one failure
away from possibly losing that antenna stow capability. But,
there was a flight rule change we made that that was warranted by
the cargo that we were carrying. Along with that comes the
thought that since you're going to be EVA, would it be reasonable
to do something with that antenna, since it can be
pyrotechnically separated. Could you then stow it back in the
bay? We finally determined that that wasn't the way we wanted to
go, but they did spend some time looking at the dish, the way
it's mounted and different places in the cargo bay that might be
reasonable to stow it. So, it's not totally foreign and that
went on the last couple of weeks before flight. So, they at
least have that much familiarity with it in recent days.

RECER One final one on the SIR-B antenna. Is there a way

to sever that thing from the craft altogether and to just pitch
it out into space?

COX No. No that's what, when we say pyro, people seem

to think of that more often than not. No it's not.

PAO Further questions in Houston. Go ahead back

there. Give your name and affiliation, please.

BENSON Maria Benson, National Space Institute. I have a

question about the ORS fuel transfer that will be conducted by
Leetsma and Sullivan. They're going to be attaching a tool to
the valves and I'd like to understand better how easy or how
complicated this actual function will be if they need ocher tools
to do it. Is it just a routine thing or is that main purpose of
that test?

COX I don't think we ever do anything in space in a

routine manner. This is not like driving up to your gas station
and getting the hose and sticking it in. There are more pieces
to that tool operation then you could imagine. What we're

STS 41-G CHANGE-OF-SHIFT BRIEFING pl3j 7:45 PM 10/10/84 PAGE 9

basically doing is trying to perform a hose hookup to a satellite
that was not designed to have an EVA refuelable interface. And
there's a nut that's been put on a valve. This is a typical
installation. It happens to be on the Landsat satellite and
we're currently looking at going up and doing a refueling mission
in the future on that one and so they thought this is a good one
to model to see how reasonable this is. The valves themselves
are down in a hole. They're a type that's, there's a valve that
takes up a pull type of actuation to actually open the flow and
on top of the valve, there's a nut. It's not in the pull
position, it's actually in the closed off, spring-loaded closed
position. There's a nut on there that has a lock wire that's
gone through the nut and the bolt and it's tied off and on top of
that. There's a dust cap sitting on top of it that's closed down
tight. It's lockwired shut and closed off and that's the start
position. You come in there and say, "This is not typical. Now,
what can I do and also keep hydrozine off myself," and you know I
don't want to all of a sudden have that stuff squirting all over
me. So, we have a whole series of tools that you use and you've
got your gloved hands, and you're trying to go in there and
perform surgery on something that is just not that accessible.
It's almost akin to the electronics box, main electronics box, we
did on the Solar Max. It's a dexterity thing that was never
designed for EVA. The first trick is to reach into this hole,
find the valve, and start clipping the lock wires. And we've had
to design special tools that have little clippers on the end of
them to try to go in and see if you can clip the lock wire off
and get untangled, untwisted, and out of there for the dust
cap. Then, since it's down in a hole, there's another tool to
reach in that will grap the dust cap and then you can turn it
off. That's not too different than any type of wrench you might
find. The next one is, you go in on top of a nut that's
lockwired, so you got to cut that lock wire off and peel it out,
then go in with a, now you're actually going to be able to get
access to this valve. The next thing you do is pull the nut off,
and pull against the valve, and you can get flow from that. And
there's hydrazine in the line behind it, so now you don't want it
to leak on you. So, we then have to back and say how are we
going to protect ourselves from that. We have a long tube-like
device that we screw on where that dustcap came from on big outer
threads. That's now a passage way that we have double seals on
the end with a ball valve that we can close off and an end that
we can screw shut. Now, what I do is I take a tool that is on a
shaft, I put the tool on the end and I have several tools. But,
I screw that in, open up the ball valve, pass the tool down the
line. I got to take the nut off then there's a good chance that
I'm going to drop that nut in there. I've just a regular socket-
type thing as I go in there and try to undo that nut. And I'm
going to try to back it back out and hold it. Well, there's a
good chance if I leave that nut in there some place in between,
then I will have missed it. I won't know until I get the tool

STS 41-G CHANGE-OF-SHIFT BRIEFING p!3j 7:45 PM 10/10/84 PAGE 10

back out of the device whether I've got it. So, that I've got
another little set of grabbers that I can pass on down that thing
and finally get it. The final tool I install through this ball
valve device is finally the one I've been trying to get to all
along. I slide it in there. It screws on to where that nut was
that I left. Then it has a rotating function that finally pulls
that nut out. It allows the flow to start and will allow
hydrazine into that tube. I, then go ahead, because now I have
something that's dangling out there that has to also be able to
take landing loads, install some brackets around this tubing
stuff so it won't bj:eak off and spill hydrazine during entry.
Then, install all the thermal closeouts back on the satellite
area, the simulated satellite area, because it is also protecting
my hydrazine temperatures and then put all of those tools away
and you've finished with it. So, that is not the way you go to
your gas station to fill you gas tank up. You got more than you
wanted, probably.

PAO Catch Jerry in back and then we'll go to KSC for a

question .

MEDIA Time Magazine. John, seems like a long time ago,

but are you current on ERBS, where is it operating?

COX ERBS is just doing some little tweak burns right

now that are in their, just about in their final orbit, and
they're just making some very small adjusts. I had that input
today .

PAO Okay, we'll go to KSC for a question.

MCKINNIS-RAY Rick McKinnis-Ray , Canadian Broadcasting
Corporation. I understand, going to Edwards is a five-day
penalty. Is that still correct?

COX Well, that's about what it's turned out to be, five

or six days. You have to look at, there's time to stack the
Orbiter on top of the 747, then you have one or two days of
transfer time, then you have to destack and finally get to a
configuration you would have been in when you landed and that's
about five to six days.

STS 41-G CHANGE-OF-SHIFT BRIEFING p!3j 7:45 PM 10/10/84 PAGE 11

MCKINNIS-RAY My point being you're now talking about being
prepared to delay the landing by a day to get good weather here
so you miss that five day loss. Are you prepared to extend it a
second day, if you have to, still to avoid that five-day penalty?

COX Current flight rules are set up and we believe

we'll stay to that, is to only do the one-day wave off.

MCKINNIS-RAY And finally, sir, can you tell me has the crew and
Mark Garneau, in particular, received any personal calls or made
any in the past couple of days?

COX No. No, you didn't hear about them.

MCKINNIS-RAY Thank you.

COX Okay.

PAO Is that all KSC? We'll come back to JSC now.

Right here up front.

GREENWALT Frank Greenwalt, Los Angeles Daily News. Is that
procedure where the astronaut goes and manually closes the SIR-B
antenna, is that completely out, or is there some circumstance
where that might be done?

COX Oh, I suspect if Kathy's view of it says that it's

not down far enough even for the pyros to work and she's right
there and she can just push it down and make the microswitches ,
it would be done that easy. I don't know.

GREENWALT Is that more likely then using the robot arm to do

it?

COX I don't know. Crip seems to favor the arm. It's a

tossup which one's most useful. She'll be on station and it
would be easy to do it, so let the crew do it either way they
won 1 1 .

STS 41-G CHANGE-OF-SHIFT BRIEFING pl3j 7:45 PM 10/10/84 PAGE 12

GREENWALT And is your sequence unchanged from earlier
regarding the EVA, when you'll be doing what, the fuel transfer,
the Ku , and the . . .

COX Everything that you've seen on the EVA timeline

that was published before flight is nominal. We're going to do
that just the way it is. And then we're going to then go ahead
and inspect the SIR-B and then move over to the antenna, the Ku-
band antenna.

GREENWALT

Thank you.

PAO

Further questions. Paul Recer.

RECER This is a procedural question, hypothetical of

course, but suppose that Crippen absolutely favored the arm and
the pyros and through some machinations on the ground ya'll went
the other way. Who determines the tie breaker or how's it
determined?

COX Well, Crippen is a very reasonable person. If we

came up with some reason why it was better, I'm sure he'd
probably agree with us. Right now, we don't really have that
much of a difference one way or the other. Both of them for sure
work and he happens to like to one that he's already done. I'm
sure he's just a directable as anybody and so if we absolutely
insisted that it be done some way and you'd hear about his
complaints, but he'd probably go ahead and do it.

RECER

Mission Control has the final word, then.

COX

That's the way it's generally set up, yes.

PAO

Well, anything more people, good night.

END OF TAPE .

STS 41-G CHANG E-OF- SHI FT BRIEFING pl5j 7:35 PM 10/11/84 PAGE 1

PAO Good evening. We'll go ahead and start our change-

of-shift press conference with John Cox. John, why don't you go
ahead and give a summary and then we'll take questions.

COX Thank you, Brian. Today, I think, was probably

the most outstanding day we've had to date on this flight. We
started the morning off with a fix of the SIR-B antenna which I
think all of us felt had the best chance of being a futile
effort, but one more time and one more good idea worked this
morning. And so, as a result of all that and the good work that
happened in the EVA, the SIR-B folks are out taking data today
and tomorrow. And they're much pleased. Looking at the score
for the payloads today, by the way, we had 100 percent in all the
corners, scores large format camera down a little bit. They
yielded SIR-B for some data times since they had it all planned
after the EVA, and you can score SIR-B at about a 200 percent for
the day since they were supposed to be down and out after the -
once the EVA started.

The EVA itself went very well. The crew stayed right on the
timeline all through the ORS transfer activity, or the ORS
configuration. They got into the tool apparatus and, if you
recall the discussion we went through the other night, they even
got to use some of the backup tools to fish out a cap that had
been lost when the nut was removed. They then went into the Ku-
band antenna pin procedure and we managed to have a little
defugilie in the cabin with having connectors that didn't mate.
We had to make a real-time fix to that. But once that was done,
the actual drive worked perfectly. They were able to get the
antenna lined up and positioned with Crip's directions from in
the cabin. And in the pins went, and it didn't take us very long
at all to get that antenna back out again and start using it.
And it put a lot of sniles on a lot of folks' faces. That was
two antennas fixed today and we look like we're in good shape for
the rest of the flight. There were some funnies. There was a
vent cap that got loose from the outer hatch. The crew chased
that down toward the end of the EVA and brought that back on in
again. It took Crip doing a little bit of bringing the Orbiter
over to the big jets and translate a bit to get the cap to move
out from underneath the SIR-B pallet. But it did come out and
Dave picked it up and brought it on in with them.

Tonight, the crew performed another waste water dump. And as we
were getting ready to do the evening's status, Mother Nature
found one more way to make us pay attention to what we're
doing. CRT 2 died and during the same LOS period, a keyboard
problem developed with the pilot's keyboard and its interface to
CRT 3, with a bunch of intermittent type of signatures that
sometimes you could type and sometimes you couldn't. So, we got
the thinking caps on for the night to see what we want to do

STS 41-G CHANG E-OF- SHI FT BRIEFING pl5j 7:35 PM 10/11/84 PAGE 2

about that. What we're looking at for tomorrow, we have the ORS
transfer that you do through the EVA connection. We're going to
do the cut-down version that we've talked about for a couple of
other times. There's part 1 of the FCS checkout where we bring
up the APU's and look at the hydraulic systems and the surfaces
related to that. Probably do the RCS hot fire and then we tried
to block out some time in the morning also to reserve some time
to maybe do a CRT swap or whatever fix we come up with tonight to
take care of those funnies.

As far as the weather is looking for Saturday's landing, we're
looking pretty good. It looks like Josephine is moving out of
the area, moving north and east still. It's predicted that the
winds will be generally out of the north for a KSC landing. On
Saturday, the winds are actually going to be fairly light with
very small gusts. At least that's the forecast at this time.
Edwards weather is also looking good with high scattered type of
clouds and good wind conditions at predicted landing time. The
landing opportunities that were passed to you, I believe it was
yesterday, are still exactly the same The same opportunities
that we have been carrying since the beginning of flight. With
that, I'll be happy to take questions.

PAO Questions in Houston. Craig Covault.

COVAULT John, on the little caper there at the end of the

EVA, is it correct that that is the cap that goes over the actual
vent valve itself, and is your - was the rather aggressive

attempt to get it, giving it some priority to go get it so when

the guys were in the airlock and moving around, they would have

protection over that cap and wouldn't be as likely to bump it?

COX It's a backup seal. It's not - you don't have to

have it. It's a protective cap to put on to make sure you don't
vent out the vent hole accidentally.

COVAULT Right. Safety cap —

COX It's a safety cap. I think probably the action to

go get it was probably fun to do, for one. Crip's used to flying
that Orbiter from the back end, he did a lot of that on 41-C.
But the other thing is that you didn't want something that size
just flapping around in the cargo bay for entry. You don't want
that to get caught in the doors or something like that, so it
seemed like a reasonable thing to pick up that piece of size of
debris and get it out of there since it had managed to get itself
caught in an area that might have kept it in there.

STS 41-G CHANGE-OF-SHIFT BRIEFING pl5j 7:35 PM 10/11/84 PAGE 3

COVAULT And a second question. I want to make sure I

understand your Ku situation now. You still have a broken gimbai
on Ku of sorts, and you're still having to point the Orbiter, are
you not?

COX Still have to point the Orbiter, but the dish is

locked up tight, same way it will be locked up for entry so that
when you swing it back on in again, it's exactly the way you
would be returning home in the typical flight.

PAO Carlos.

BYARS Let me ask you some more about the Ku and its stray

wire. Have you gotten any report back as to what was it or was
it what you thought it was, and how was it that it was - that it
came adrift.

COX That one got closed out the other day. That was

really after Crip got another look at it with the RMS, he
concluded the same thing that we had already concluded by going
over and looking at the antenna over in building 44. All that it
was was the normal wire configuration, he just had a bad angle on
it that looked like he had a split wire but really was same size
wire, or wire bundle branching, that he couldn't see the fact
that it had done the branching. And that the hole that he saw,
or the connector that he thought looked like a wire had pulled
out of was merely a cap over a vent hole that had a small hole in
the top of it to provide the proper vent, and it looked like it
might have been an electrical connector, but it was just a vent
cap.

BYARS So it wasn't - there was no wire had drifted off?

COX There was nothing externally wrong that we can

tell .

BYARS I'm glad I only wrote 12 or 14 paragraphs about

it.

PAO Mike Meechem.

MEECHEM On the Ku, I'm trying to visualize what exact part

of that you bolted down today. Am I correct that you, in
essence, bolted down its shoulder and its elbow, but the wrist is
still movable?

COX No, you've probably got it almost exactly

opposite, Pete. The big box, the big electronic box that swings
in and out, that's still free to move.

STS 41-G CHANGE-OF-SHIFT BRIEFING p!5j 7:35 PM 10/11/84 PAGE 4

MEECHEH Okay.

cox If you look at the electronic box as my forearm,

all the gimballing activity associated with the dish has been
stopped, the thing that the gimbals used to do. The beta that
had the problem is kind of like the waving motion --

HEECHEM That's with the wrist?

COX Like wrist wave. Okay? And then what had

happened during the whole flight is it had been pinned over to
its hard stop, and what you were seeing in motion the other day,
was the alpha just flipping all over this way --

MEECHEM Right.

COX -- the roll of the wrist. That activity is what

we set two pins in, to lock that up. So now that can't move at
all, but we can rotate the whole dish out and then rotate it all
back in , and it's stayed in the angles that it's supposed to be
in for entry. So we just bring it out and - they don't have any
pointing ability other than with the Orbiter, but it's locked up
tight .

MEECHEM How long can you go before deorbit burns as far as

the selection for site. How far would you push that if there is
a weather problem?

COX Oh well, you can count that up in a number of

different ways. And we have scored that already in all of the
different ways that we can think of. Prop-wise, we could
probably stay up another couple of months.

MEECHEM Please, do not discuss this.

COX But we don't plan on doing this. I have no

intention of that either. But that one gets shortcut by several
of the others.

MEECHEM Let us hope.

COX The consumable that we most track is the

hydrogen. Hydrogen says that we're on the order of 3 plus
days. That's probably the limiting item. Onboard crew food is a
function of what you thought everybody was going to eat
pref light-wise and you have stowed and everything, says there's a
couple of days. But that's always an up and down as far as the
pantry is concerned. Some crews eat it all and some crews leave
plenty .

STS 41-G CHANGE-OF-SHIFT BRIEFING pl5j 7:35 PM 10/11/84 PAGE 5

MEECHEM Well, we know that they left some because they

didn't give them lunch today.

COX Right. No, they had lunch, they just didn't get

supper today.

MEECHEM Was that it? No, but what I meant was, once

you've decided you're going to come down Saturday, if that's your
decision, are you going to go almost right before the 191st orbit
before deciding whether you're going to come straight into
Kennedy? If you've got a weather - if you've got a wind issue at
Kennedy, will you push it right to the edge before deciding
whether you would go to Kennedy or to Edwards? Would you push it
right to the edge before you decide to wave off for Sunday?

COX Well, the weather options - you know how much fun

it is to control and predict the weather. It's a little bit -
it's probably a little bit more straightforward for this flight.
Since all of the landing opportunities come on descending nodes,
you don't have the question of, is the weather going to change
from the darkness to the sunlight? These are all about midday
landings, so the sun will be up and you'll have an idea of what
that thermal change is going to do to the moisture in the
atmosphere and all that. So that does take a little bit out.
However, what also comes into play is that we still have the
normal tropical type of nature that still is going on until you
get into the winter time around here. So you can still get
clouds developing, or thunderstorms, or that type of thing. It
looks like the influence of Josephine will still be there tailing
off on Saturday, and that will sort of fix our wind directions to
be more out of the north, which is more favorable for a runway
point of view. So you won't be into the normal, typical Cape
weather until probably Sunday. We're thinking that maybe if
that's sort ol: a clearing, dry type of air in the Saturday
timeframe, then that might be the best day to go in since if you
do get gusts from the winds, they'll probably be more aligned
with the runway, which is the way you 'd like to have them. And
the weatherman was kind of indicating that that wind will be
generally coming in off the land, as opposed to off the water
during that timeframe, which would tend to keep some of the
moisture down. You know, that's all - what we're trying to guess
a couple of days away right now, but Saturday is looking like the
better day. We would try to go on in to the point that it was
clear that we would or would not make the Cape, and then you have
to make the decision as to what are tomorrow's chances. At that
time, does tomorrow look like it's going to be an acceptable day,
and if it is, then that's when you make the decision to wave off
and come in to the Cape again. If tomorrow is not predicted at
this time to be an acceptable day, then you go take the Edwards
on Saturday.

STS 41-G CHANGE-OF-SHIFT BRIEFING p!5j 7:35 PM 10/11/84 PAGE 6

MEECHEM Okay. And what are the parameters you would

permit yourself on a crosswind? Is 12 knots, is that the upper
limit?

COX No, I believe the Cape is at 8, but I don't have

the rules right in front of me. I could get those for you. You
need to check with Cleon on those.

MEECHEM Okay.

COX Or just check the flight rules.

BYARS John, if you're looking at a wind coming in from

the north, would you change your runway from nominal 17 to
whatever, 330 or whatever it is?

COX Well you only have one runway and it —

BYARS Well, I know it's one runway —

COX You'll always take your landing so that you're

going into the wind.

BYARS Okay. Unless I'm confused, the way it's presently

been described is that you would be landing with the wind.

COX No, you always land into the wind. You want it to

slow you down.

BYARS I know that's what you would prefer to do. Okay,

I'll talk to you .

COX Okay.

PAO Paul Recer of the Associated Press.

RECER You've got trouble with the keyboard, on the pilot's

side you said?

COX Right. The pilot's kind of out of business. The

CRT on his side went caput and his keyboard isn't talking very
well .

RECER Okay. Could those be connected failures?

COX We sure hope so, that we find some loose connector

or something like that that will explain it. Everybody is
scratching their heads trying to find a commonality. We lost -
there are three devices that all of a sudden started having a
hiccup between LOS periods. CRT 2 we lifted off with with a BITE
message indicating a potential temperature problem. It ended up

STS 41-G CHANGE-OF-SHIFT BRIEFING pl5j 7:35 PM 10/11/84 PAGE 7

getting a different signature and went blank on us, saying it had
a DEU related problem, the software that drives it had a funny.
So that CRT turned itself off, that's the one up by the pilot.
In addition, during that same LOS period, the pilot's keyboard,
one column of keys stopped working, all of the others were
working, and it only had that problem when it tried to talk to
CRT 3. CRT 2 was out, it couldn't talk to it and those are the
only two it can pick. The more we suggested troubleshooting and
used the malfunction procedures in the book, every time Crip
tiied something different on that keyboard, it had a different
signature. These keys worked and those didn't, now those work
and these don't. It turned out that the other keyboard could
talk to CRT 3, so there is a commonality that seems to be related
to the pilot's side of the cockpit. However, that isn't
necessarily where all of the cabling that drives all of that is
located, so everybody is trying to see what the relationships
might be that - we're hoping to find one thing that would explain
it all. Right now, probably the best guess is we took two
different failures. One is the CRT 2 and then the keyboard and
CRT 3 are probably related somehow.

RECER Okay. I understand you can switch out the CRT, of

course, but can you also switch out the keyboard?

COX Yes, you can. You take them both off the back

panel, CRT 4 and the keyboard that you use back there in the
back. They're both available for swapout to the front.

RECER Okay. And if you can't find a commonality, is

that likely to happen tomorrow?

COX Well, that's the way we worst case figure tomorrow

morning, there is laid out time to do both those swapouts if we
need to. It's not clear that we'll have to do that, but just in
general terms, we're trying to block out enough time to do that
if we needed to.

RECER Okay. And how long will the SIR-B be taking data?

COX The plan is to stow them nominally prior to sleep

tomorrow night.

RECER Tomorrow night? So it will take data through

tonight and —

COX Through tonight and all day tomorrow, and then

stow them tomorrow night.

RECER Okay. Do you ha ; idea how much additional

that will add to what they woulu ..«»-.■-; gotten if the antenna had
worked properly?

STS 41-G CHANGE-OF-SHIFT BRIEFING p!5j 7:35 PM 10/11/84 PAGE 8

COX If the antenna had worked properly and then you

get in all the other - it probably represents, and this is just
off the top of my head, for what they actually get for this
flight, it's probably about a quarter of it.

RECER So this adds 25 - because the antenna is now

working, it adds 25 percent to their data take now?

COX That they would have been collecting. Now, that's

not what they would have expected to collect preflight because of
the first several days of problems, but what they actually
capture for this flight, it's probably 25 percent of it, or in
that ballpark.

RECER Okay.

PAO Henry Cooper. In the yellow shirt, fourth row.

COOPER At one point, Crippen was discouraged because some

piece of equipment had two female ends. What did that refer to,
what were they trying to do at that point?

COX That was the - that's when we had a little funny

with that IFM that they worked to drive those pins. The crew had
installed the IFM procedure that we had given them and the
procedure did not call for them to power up the connectors and
all that sort of stuff prior to EVA. And when they actually went
to put the pins in, they found out that chey had two female
connectors that they had to connect up and they had to go back to
the IFM kit and get an interface connector that changes the
female on one of them to a male so that they could go ahead and
hook up the wires.

COOPER Are these the pins themselves, or something else?

COX We make up little jumper cables when we do these

IFM's. You kit has a piece of wire and then on the end of this
wire, you can put what you like, a male connector or a female
connector. And then you can also put on that wire the thing that
we use to go talk to the big electrical cable connector that has
a bunch of pins or holes in it, depending on what type we're
going to. And you start with a connector, you find an end piece
that you have to fit onto it, then you hook the right wire onto
it. Then you go to the next place that you're going to connect
into, you put the appropriate fitting on the end of that, and
then you plug that into wherever you're going to get the power
from. The procedure had called out for the wrong type of
connector to be on the end there.

COOPER I'm a little bit in the dark. This is to kind of

make an extension cord to pass electricity through?

STS 41-G CHANGE-OF-SHIFT BRIEFING p!5j 7:35 PM 10/11/84 PAGE 9

COX Right.

COOPER So that you've got electricity from the Orbiter

into the antenna to make it turn?

COX Right. See we had disconnected that cable that

goes out to the antenna. So there was nothing from the
electronics assembly talking to it. There was no power in the
line. So we picked out just the pins that would drive those pins
and we had to provide our own electricity for that, so we just
went over to a wall outlet and ran the power down. However, we
never did make the final connections, and they hadn't noticed
that the two different wire; that they still had to hook up,
where one is on the flight deck and one is down on the middeck,
they hadn't noticed that they were the different connectors
either .

COOPER Thank you.

PAO We'll take this question, go to Ottowa and KSC,

and then we'll come back.

MEDIA Two short questions for you, John. One, about

Marc Garneau. How much of a problem is it in changing things
around so that he can have that opportunity for the extra sunset?

COX Oh, we felt already that he probably needed

that. We had a question anticipating that and it all tagged up
as a good discussion there at the end. And we don't anticipate
that being any real significant problem. We had anticipated we
probably had to do it, but we were going to ask him had that
dialogue not started, if he had managed to pick that up during
the flight yet. And if he hadn't, we were going to schedule it
in so we were already planning on doing that.

MEDIA The second question relates to IMAX. They had a

heck of a lot of fun today filming IMAX and MAX as we drop the
I. Have they been able to use all of their canisters? I noticed
Crip said there was a bit of a problem, it was acting up today.

COX It sounded like it had a jam right at the very

start of the EVA , but shortly after that, he was also taking
pictures. So whatever the jam was, he had it cleared, and he
never reported any more problems with it and used it all
throughout the rest of the time. So, I don't know what the
problem was but it cleared right away.

MEuIA Does Flight Control get into the film as part of

the privilege of taking it up there?

COX Does Flight Control get into the film?

STS 41-G CHANGE-OF-SHIFT BRIEFING pl5j 7:35 PM 10/11/84 PAGE 10

MEDIA Because these has been some ground filming for the

I MAX film.

PAO We did that on the last flight.

COX Oh, yes. We've done that on a couple - at least

one flight if not two flights in the Control Center. We're not
doing it on this flight.

PAO We'll go to Ottawa now and take a question there.

HOG AN This is Brian Hogan from CFUR radio. I just want to

clarify a few things. You said that the repairs made on antennas
today were successful. Were they major repairs or just fairly
minor maintenance?

COX Well, when it's successful, you can call it

anything you want. But it was successful. We're real happy wien
them. The SIR-B, we actually had to invent a new procedure to
try to close them and what we did was, came up with a way to
drive both the stow motors simultaneously to get the extra torque
that they could provide so that we could finally trip the
microswitches to let the latches drive. That was a new
procedure. We had been scratching our head for 3 or 4 days tring
to figure out how to make the SIR-B antenna work. It was
probably a very little fix. The procedure was one page long of a
few little checks, and you might stand back and retrospectively
think that was a piece of cake. But it was several days in
coming until somebody could figure it out, and I think from the
SIR-B's point of view was major because now they're able to
operate. The Ku-band antenna, that was a problem that really had
us baffled for a couple of days just trying to figure out what
the problem was there. I think that the fix that we put in, all
it is is a fix that lets the antenna fly entry without any
further damage to it. And whatever the problem was that was
originally there is still present; however, by pointing the
Orbiter we're able to compensate for the lack of pointing ability
of the antenna. And what we do now is - we're in a mode that we
were in for several days where we put data onto a high data rate
recorder and then during the Ku-band acquisition to the TDRS
satellite, we dump that data periodically, maybe three or four
times a day by the time we're finished. So we're kind of not
operating in the way we planned to operate pref light, but we're
able to accomplish most of the data takes that way,

HOGAN Okay, and just briefly, the decision will be made

at this time roughly tomorrow as to whether you would land at
Kennedy or Edwards?

COX Well, if you recall, flight 7 and, well, at least

Crippen's two other flights and how several of the other

STS 41-G CHANGE-OF- SHI FT BRIEFING p!5j 7:35 PM 10/11/84 PAGE 11

flights have gone - or two of Crippen's other flights. We have
gone right on down to deorbit time if we thought there was really
a good chance to get into the Cape. We may get that close again.
The weather is looking pretty good to come in there. And I
suspect if it looks reasonable, we'll just continue right on
through the deorbit prep timeline and come on down to the point
that we would make the decision. You'll probably know your
predictions for the following day about as good as you're going
to know them several hours before the deorbit opportunity. So
you know how you'll play the rest of the decision and the
decision you'll have right in front of you is, is the landing
today going to be acceptable at the Cape? And you'll make that
in the mission morning, or the one you're going for.

HOGAN Thank you. No more questions here.

PAO We'll go to KSC now.

McCANDLESS Rick McCandless, CBC radio. Can I ask you as to
whether the performance today of Kathryn Sullivan says anything
about the future for women in spacewalks? Is she reporting any
ill effects, etc?

COX No, I didn't notice anything in the way of ill

effects. I thought she had an outstanding day. I thought Dave
did also. They both whipped through that timeline in about the
pace that you would have expected - expect them to do it in the
water tank. Kind of like the 41-C folks and anybody else that's
been EVA, once you're well trained, you can get through your
normal activities. And then the thing that surprised us all was
how fast the Ku-band antenna was restored. That could have taken
awhile just playing with it. And I think the only delay time
that we saw in the whole activity was Crippen and Sally going in
and fixing the connector problem we had. So, I thought the whole
- all the activity was super for both of them. I thought Kathy
was an excellent performer and so was David.

McCANDLESS Just to follow up. Weren't there in the past
concerns about female upper body strength, that type of thing and
how it would affect them in space?

COX I don't have any problems with that and I'm sure

Kathy doesn't either.

McCANDLESS ThanK you.

PAO Back here at JSC now. Jerry Hanipen, way in the

back .

STS 41-G CHANGE-OF-SHIFT BRIEFING p!5j 7:35 PM 10/11/84 PAGE 1

HANIPEN Just a followup on Carlos' question, John.

Assuming the wind is more or less down the runway from the north
which I guess that's runway 30. It's going to be a left-hand
turn, it's going to be a right-hand turn to the final?

COX Somebody can probably call that over and tell —

PAO The right overhead, Jerry.

COX Right overhead.

PAO Any more questions, please? Oh, I have an

announcement to give you. On top of everything else we're
throwing away tomorrow, we have a 9 o'clock a.m. central time
SIR-B status report with Charles Owatche and Mark Suttle from
headquarters, and I understand there are some new photographs
including what is supposed to be a real nice one from Peru.
That's at 9 o'clock tomorrow morning. Thank you.

STS 41-G CHANGE-OF-SHIFT BRIEFING p!6j 7:35 PM 10/12/84 PAGE 1

PAO Okay, let's have the final change-of-shi f t briefing

for this flight. I guess the next one will be the postlanding
briefing, tomorrow with Dr. John Cox, off-going flight director,
with all the good entry numbers and weather predictions. John?

COX Hope I don't have to give you all those numbers.

That's why we have the handout. When I left over there, the
Challenger was all buttoned up. The vehicle's been stowed. The
crew's ready to come home. Going through the list of some of the
things we did today - that we had that funny problem last night
with losing CRT 2, and then the fact that the pilot's keyboard
couldn't talk to CRT 3. That was checked this morning. Did a
quick re-IPL of DEU 2, that fixed it temporarily, but then it
failed again. But, they think there may be some of, possibly,
thermally related power problem or something like that in that
DEU, because when it was brought back up it quit shortly
thereafter. So, we went and swapped DEU 2 and 4 just by doing a
cable swap. And the CRT 2 is now being driven by the display
electronics unit that normally is driving the display that is in
back of the bus. That ran fine all day long. A little gremlin
got in and fixed the keyboard to CRT 3 interface, because as soon
as Crip went to use that this morning, it just worked fine. So,
we been scratching our heads all day on that and don't know
exactly the reason it didn't work for awhile and don't know the
reason it's working now. However, of the different problems that
we did have, we feel that the DEU fix is the good fix that should
keep that CRT working. And now the only thing that we can't
explain if that keyboard problem, we'll just have to select the
CRT displays from the commander's side and that's no big deal.
This afternoon we stowed the SIR-B antenna for the last time and
that all went well. Used that double motor drive procedure that
we used early in the flight. This morning, we performed the FCS
checkout, the RCS hot fire. We finished the ORS transfer off,
did the normal on the first half of the one we would' ve done
after the EVA on the original flight plan and then later did a
transfer back into tank one, so that system's all buttoned up and
ready to come in. The crew went ahead, in part of their stowing
operation, they also put away the EMU's from the EVA yesterday
and had that all stowed again in the airlock. And the crew
received a call from the president today, as I'm sure you're
probably aware. The entry numbers have all been passed out to
you. In quick summary, the weather at the Cape is looking good,
the wind was 10 gust .ng to 15, is what the, something in that
order is what's expected. It's pretty much out of the north and
we don't feel it will have any significant problem. Otherwise,
the cloud cover appears to be scattered decks and it's mostly
from from a dry source, most of that wind direction is coming in
off land from the north. So, it's not bringing in a lot of
moisture. Weather is also good at Edwards.

STS 41-G CHANG E-OF- SHI FT BRIEFING pl6j 7:35 PM 10/12/84 PAGE 2

So, things look excellent for a landing tomorrow. The deorbit
time will, in Central Daylight Time, is 10;29;30, with the
landing at 11:26:29 Central Daylight Time. We are going to do a,
at least attempt, one little extra little feature that may change
our acquisition. You're aware that normally we don't acquire
during blackout. We've selected TDRS for this entry and so we'll
try to acquire with TDRS. And that's the time that's down on the
bottom of the sheets. That'll be at 11:01:59 or basically 11:02,
we'll try to pick up some data that way and have it continuous on
down to landing. In addition, after landing, and you know post
rollout, we're going to do another test with TDRS and see if we
can acquire data through TDRS by pointing the satellite at the
runway. In the long run, we'd like to be able to, in the event
that we ever have an abort to a some foreign country or something
like that and not have a standard data transmission, just be able
to aim the satellite dish, and pick the data up off the runway,
and work with the crew like we normally would. So, those are a
couple extra features for tomorrow's landing. And with that I'll
be able to, happy to take your questions.

SELTZER
allowable?

Frank Seltzer, CNN. John, what is the crosswind

COX The rules carry a demonstrated value for Cape

landings and that's on the books as eight.

SELTZER
said?

You're getting 10 to 15 knots, is that what you

COX

That's not in crosswind, that's total wind.

SELTZER Total wind, what's your, we had heard earlier from

the Cape, that 10 to 15 crosswind from...

COX No, that's total wind and that's wind out of the

north, I think it was either at 360 or 10 or something like that

SELTZER But, that's just total wind, so that's not a

problem?

STS 41-G CHANGE-OF-SHI FT BRIEFING p!6j 7j35 PM 10/12/84 PAGE 3

COX Total wind. The crosswind is up there, I mean

it's getting up the 8 knot area, but, we don't at this time,
don't have a violation expected,

SELTZER If you get nine knots, will it be something to wave

off tomorrow morning or...

COX I don't know, I doubt if... that crosswind that we

use, that eight knot number, that's just kind of a criteria. The
vehicle's supposed to be able to take quite a bit more than that
if we're landing any place else other than the Cape, we obviously
opened it up. And I think, given all the various conditions,
that are possible, if everything is clear and there aren't any
problems otherwise anticipated, I don't think an extra knot of
crosswind would stop us from coming in. But, we have to make
that call tomorrow.

SELTZER And there's one other thing you've got denominal

for deorbit on 133 landing and 134 would make you wave off to
134.

COX Oh, there's a series of flight rules that we go

through. They're mostly systems failures, they're not, you
wouldn't be doing that primarily on weather. Primarily, that
would be on, there's a whole cue card of failures that we carry
in the entry books that you go down, if you took a GPC failure at
this time or this or that and I don't have that in front of me to
give you a list of which ones we would do the one rev wave off
for .

PAO Craig Covalt, Aviation Week.

COVALT John, did the sim runs today show all PTI's are

going to go in where they're supposed to go in?

COX I didn't see those. Those people were just coming

in as I was about ready to leave, so we may call over there and
find out.

COVALT Okay, and secondly, is the CRT issue. As they're

set now, they've got three good CRT's up front and...

STS 41-G CHANGE-OF-SHI FT BRIEFING p!6j 7:35 PM 10/12/84 PAGE 4

COX

problems .

Three good CRT's and three working keyboards, no

COVALT

So, no issue on the PTI's on that?

COX

NO.

COVALT

Okay, thank you.

PAO
there .

Okay, up here, well take Mike Williamson back

WILLIAMSON Mike Williamson, Shuttle News Service. I noticed
an entry here on the handout, double toggle. What is that?

COX Someone is going to have to call over the answer.

I'd just be guessing right now.

PAO

Up front, here.

JACKSON Dave Jackson, Time Magazine. Do you have an end-

of-mission set of percentages now for all those experiments?
They were giving us a day by day percentage wise what was
accomplished. Can you tell us now what...

COX There'll be a report out, that'll come out tonight

and it'll status all of that and I haven't seen the final
numbers. You know that the S1R-B will probably be the only one
that's down any. The rest of them will be right at 100
percent. They've pretty much hit just about all their targets.
I think file and maps are way up there. They've been doing super
for the flight and large format camera, I believe, they've
probably shot almost all their targets.

PAO

Henry Cooper, New Yorker Magazine.

COOPER What is the double drive method of shutting the

SIR-B? And why wasn't it used before?

STS 41-G CHANG E-OF- SHI FT BRIEFING p!6j 7:35 PM 10/12/84 PAGE 5

COX That's the one we finally came up with the other

day, Henry, when we, just prior to the EVA. They tried one more
trick, figured out how to get both drive motors going at,
simultaneously. They had a little extra torque to close that
outer leaf.

COOPER When you say both drive motors, what is the other

one? I mean what would the two ordinarily be used for?

COX The system was set up to be redundant in all its

different actions that it can perform. And it had a single
electric drive that was supposed to do everything, we called it
box A electronics. And we would operate the entire flight on box
A. Box A also has some of the auto features that drive the tilt
mechanism through the software system. There's another way to
drive, another set of electronics. And that's the box B
system. If you have tilt the antenna, then that all has to be
done manually. So, we primarily are staying off the box B and
the way the switches work, generally you're set up so you can't
get box B and box A up, or at least that's not the way you
normally set up. They found a way to get us configured to be
able to drive with the motors from both systems, to double the
torque that we were putting on the leaf that pushed that outer
leaf down harder and was able to trip them — the microswitches
to allow the latches to drive. That was the way we did the
closure prior to the start of the EVA and looked like that was
going to do the trick. The crew had thought all along that we
were just missing the microswitches by just a little bit and they
thought that the pyro systems would work. When we went to the
double motor drive, it confirmed it. We did make the
microswitches and then we knew the pyro system and the electrical
system would work and there's a double pyro system in addition.
So, we got a great deal of redundancy back. Didn't work exactly
the same way today. We only got one of the microswitches to trip
but it did get down there, so there's probably a bit of a
tolerance problem with those microswitches also.

PAO Craig Covalt.

COVALT Toward the end of the day, they read up the record,

some of the records that you guys set this week. If you can, I
guess compare going into it, it was a pretty full plate worth of
mission activity going into it. Compare that with the even
fuller plate you got when you had to do so much replanning. How
do you feel about that whole activity?

STS 41-G CHANGE-OF-SHIFT BRIEFING p!6j 7:35 PM 10/12/84 PAGE 6

COX Well, it was a full plate, but I think the way the

plate gets worked off, most of the, a lot of those records were
in the way of attitude maneuvers. That is probably a, burden
wise, extremely tough on the ground to work those up. As far as
the crew is concerned, unless there is an exorbitant number of
those maneuvers, they're just going to read that off a page in
the CAP, key the numbers in, and just have to keep their nose in
the book and type it on the CRT's. But, the actual numbers that
they would be doing each time doesn't make a whole lot of
difference, whether they go this way or that way for a SIR-B data
take, I don't think you memorize the sequences or anything. So,
we were having to give them pages. And I think as far as that
part of the job, it was not that big a difference to the crew.
They expected the changes. We expected the changes. We expected
the changes before we lifted off. That's just the type of flight
it is. You knew that cloud cover and whatnot was going to hurt
some targets and so you're going to want to trade those targets
off with SIR-B data and whatnot. So, you knew there was going to
be some scrambling. So, they expected to probably have to work
off of teleprinter 3heets that we were going to give them each
day. That was not that big a deal. The rest of the other
activities were basically just moving days at a time around. So,
that worked out pretty well.

COVALT So, your total numbers of, record setting numbers

there, really is not that much of an indication of the nits you
had to pick throughout the flights on replanning and so forth.

COX It's more of an indication of probably the ground

burden more than the crew burden, working the flight plan out. I
think the crew burden may have ended up similar. There's a
little bit of uncertainty you have each day about not knowing
what you're going to get up on the teleprinter. That's why we
like to give them a rough pack of what the day's going to look
like in the evening status the night before. But, I think once
you do that then they know the basic day layout, the rest of it
fits pretty well.

PAO Paul Recer, AP.

RECER You had several days now to scratch your head and

evaluate exactly the repercussions of losing the, part of the
blanket on the OMS pod. What is the best prediction now as 'zo
what will occur tomorrow when you come in with that tile missing?

STS 41-G CHANGE -OF-SHI FT BRIEFING p!6j 7:35 PM 10/12/84 PAGE 7

COX Some delamination. That's about the only word. I

again asked that question today, and there's just some
delamination. They don't expect any significant damage, but
it'll be some OMS pod delamination and they'll have to look at
what they get to try to figure out how much repair work is going
to be required.

RECER Okay, after landing down there, are they going to

bring in any special equipment as a result of that potential
or . . .

COX Nothing that I'm aware of now.

RECER Going to drag it over to the hangar.

COX Yes, it's real close to home there, so that's a

good place to work on it.

PAO That double toggle there has to do with making a

right turn and then coming around and doing a left turn onto
final so that the commander can look out the left window and see
the runway.

COX That's Crip's left handed landing arm.

PAO Okay, over there on the end.

PATTERSON Bob Patterson, News Radio. John, I know you were
just one of three flight directors, but being the orbit flight
director, could you give a fair assessment of Canada's first
astronaut's performance?

COX To me, Mark, sounded fine. He sounded like the

rest of the crew. His reports were good. It was clear that he'd
been busy everyday. And I think he did a fine job. We don't see
any data from what Mark did, so what we have to do is go by the
little bit of conversation that we have each day with him. But,
it all sounded fine to me.

STS 41-G CHANG E-OF- SHI FT BRIEFING p!6j 7:35 PM 10/12/84 PAGE 8

PATTERSON Outside of our experiments that we had onboard,
there was also again the RMS. It had to do a lot of work on this
mission .

COX Well, I think as the president said today, that was

like having three Canadian arms up there, Mark and the RMS. The
arm, we have used many times and this program is, I don't think
we'd be anywhere close to where we are today without that arm.
That arm has saved us many times. I remember well the ice from
last flight for example and we worked the EVA options on how to
get that ice off and we couldn't find a good one. The only good
one we could find also used the arm. So, the arm by itself was
the way we finally elected to go on that. On this flight, the
arm again came into play with some off-nominal things and I don't
know whether you caught the comical remark at the end of the
day. But, as a joke, the CRT problem that we had had the night
before, the our RMS operator in the room there said, "Well, he's
working on an in-flight maintenance procedure to use the arm to
swap the CRT's out. We're getting to like that tool.

PAO

Any further questions, here? Craig Covalt

COVALT

Today, was your last mission control shift, right'

COX

That's what this is.

COVALT Well, let's see. Since today was your last mission

control shift, would you like to take this opportunity to
announce for political office or something?

COX

for me.

I don't think that will probably be in the future

COVALT

And you're going to the space station, right?

COX

That's the plan,

COVALT So, today's your last shift and you're not going

to run for political office, and your former flight director
going to the space station, you think they should move mission
control to Kennedy?

STS 41-G CHANGE-OP-SHIFT BRIEFING pl 6j 7:35 PM 10/12/84 PAGE
COX No .

COVALT okay.
COX

goSd reason to dS ?h"* itJTt str ^^t out. I can't see any
that anything di?ec^ ' reiateS^^^ 6 " some . da y' but I don't see
to Vandenberg also? V relateb there ' >°u might as well move it

beUer weather^Any" "guest io^O^ here ' h * ve
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END OF TAPE

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KENNEDY Th , nk 1)A „ „ spirits,

inank you, Doctor Tilford.

TILFORD Thank

?Saf i nni he k i nd ° f ^"orma?i;n t 2?'diS% eXtremely pleased to

STS 41-G POST LANDING BRIEFING p!7j 12:30 PM 10/13/84 PAGE 2

operation has really been fastastic in terms of trying to
reprogram around the number of minor difficulties and in some
case major difficulties and others. And when I thank the crew, I
want to thank the whole operational staff, and the amount of
effort that's gone in to re-time lining, in order to make this as
successful as has been. That's beginning with the launch of ERBS
and trying to get in deployed in an appropritate way. And,
again, I think the man component was very important here. Also,
I'd like to thank Canada for having the arm which we have used
for a number of purposes over the past few days. Thank you. I
think, all in all, this has been a very successful mission. We
have had some problems, as you know, with the TDRSS antenna and
subsequently TDRSS itself. I think in the case of the launch of
ERBS, everything is going perfectly. That's really fantastic how
smoothly that went after the solar panels were deployed. In the
case of MAPS, following the large format camera, and in every
case, we have essentially 100 percent, and in some cases 100
percent plus of the data that we anticipated obtaining with this
mission. In the case of SIR-B, there is some slight
disappointment. We will, I think, achieve about 40 per cent of
what we had set out to do, of course, we have some new data, the
resolution on the information that we've processed for the first
priliminary tapes looks extremely good. We did not get to cover
as many sites as we had hoped alfchoulgh we will provide data to
all investigators, I think, without exception in the case. So
all in all, I think the mission has been successful, and we are
very pleased to have it back on the ground, and I want to again
thank the crew and the STS operational people. Thank you.

KENNEDY Thank you. We are ready for questions from the

press. We will start over here with James Fisher from the
Orlando Sentinel.

FISHER Doctor Tilford, how long will it take to assimulate

and study all of this data we are getting from the OSTA
experiments. How long before we know pretty much all we are
going to know about it.

TILFORD Normally scientific investigations of this magnitude

reguire some place between 18 months and three years. So, I
think, before we will have a full assessment of how successful
the mission has been, will take two years to 36 months.

FISHER Will we get, how soon will we get sort of an initial

feel. I mean, some of the main things... how soom might we know
the early data.

TILFORD Well, I think, the main thing is we have to look at

the data the first time through the processing stream which will
take several weeks to several months. I think, however,- in the
next few days, we will be able to access how much data we havs

STS 41-G POST LANDING BRIEFING pl7j 12:30 PM 10/13/84 PAGE 3

got, and then in the next few months we will be able to access
the quality of the data.

KENNEDY Mike Meechum, Canet News Service

MEECHUM Ah, two questions for Mr. Moore. First, if you can

give us a brief status report on Discovery; and then if you can
look a little further ahead, what are the emphasis on the next
two months. But as I read the manifest, you are trying once a
month, right through next May. And if you can address just the
issue how well you can keep forces working once a month on that
kind of a schedule all the way through those months.

MOORE Well, let me address your term situation here. Our

next two flights in particular. As you know, our next flight and
the second flight of Discovery, I should say, scheduled for no
earlier than November 7. And then the following flight will be
another flight of Challenger, scheduled for no earlier than the
eighth of December. And in the next year we are on about a once
a month kind of a schedule. We believe that the system
efficiencies are increasing. We think the teams are capably of
meeting the kind of turn around times we have to meet. And we
have seen that demonstrated hare in the past several months,
since the June time frame. I think the learning process , . , t ' m
very pleased with it, and I think the team morale is excellent.
Not to say that we don't have challenges ahead of us, but we are
certainly confident that we have got a good shot in making the
kind of schedule we set for ourselves. With respect to the other
part of your question on Discovery, we are in the process now of
changing out some components on Discovery following a flight
readiness testing that we did yesterday. We changed out a servo
actuator on one of the main fuel valves on an engine, and we
changed out a pneumatic valve, also on one of the engines, at
this point in time. We have spare parts for those here at the
Cape. And, I believe, they have been installed as of now, and we
are back into the flow process for Discover scheduled for low
altimode pf for about midnight Wednesday or early Thrusday
morning. And from the indications I get from the KSC people, I
think we are in good shape to make that at this point in time.

KENNEDY Bill Hines

HINES Yes,, in regards, to Tilford, we were much impressed

by the SIR-B pictures up around Montreal especially in view of
the fact that they were taken through overcast? and I was
wondering if you could sort of strike a balance between the land
set type of pictures that are made with visable light and the
SIR-B type pictures that are made in micro wave really, and tell
where the one is better and where the other is better.

TILFORD Well our total objective in the Earth Science

Program is to combined the two different kinds of information.

STS 41-G POST LANDING BRIEFING p!7j 12:30 PM 10/13/84 PAGE 4

The land set type pictures give you spectral ones information at
different wave lengths. And, of course, that is limited by
clouds and other seeing conditions. In the case of the synthetic
appature radar, we penetrate clouds so that we can see directly
through thorn. What we see on the surface, in this case, is
considerably different. We are primarily looking at roughness,
moisture content, and changes in refractive indices. So the two
kinds of data complement each other. As this is essentially the
second phase of a long term synthetic appature development
program, we are just beginning to learn the kinds of information
that we can get back in terms of the solid earth, the liquid
earth, the atmosphere and those things that grow on it. So, we
hope, in the decade of the 90 's to be able to combine the
spectral kind of information we get from something like landsat
and future instruments in the optical and the near IR with those
in the micro wave, at different wave lengths, with different
polarization, and different look angles in order to give us the
full characterization capability for looking at the total earth.

KENNEDY Bob Bazell, NBC

BAZELL Ah, Jess Moore, NASA's camera showed a close up of

the wing of Challenger and some gunk underneath as possible
damage, what was that.

MOORE We don't know what that is at this point in time,

Bob, we are going to take the Orbiter back into the OPF and take

a hard look at that and make an assess for that point in time. I

saw exactly what you did, we are not sure what that is.

BAZELL It looks different from the usual kind of tile

damage. Is it possible there was some collesion with something
up there?

MOORE Who knows. I think there could have been some

debris even during ascent or during entry, that we aren't sure
about. We are just going to have to sit back and pull that in
the OPF and take some real close up looks by the experts before
we make and assessment on that. That's our plan, Bob.

KENNEDY Bill Broad from New York Times

BRAOD Mr. Moore, in the light of the cew working through

the different problems of the Ku-band and all that kind of stuff,
and the value of man in space that ycu were talking about. What
does this mission say anything about the value of women in space?

MOORE Well, man was used in very general terms. Obviously

women play an extremely important role in all of our crews and
you have seened that demonstrated, not only in this flight, but
other flights. There were certainly no indications of that in my

STS 41-G POST LANDING BRIEFING pl7j 12:30 PM 10/13/84 PAGE 5

comment. I was using human ... short Cor human if you want to know
the exact term here, okay?

KENNEDY Frank Cuzendo from Today

CUZENDO For Jess Moore, J. have two questions. You mentioned

that actuator on the fuel valve on Discovery. Is that in any way
related to the problem that occurred in June?

MOORE It's not on the same engine, obviously, but it is

very similar. I mean, it's the fact that the actuator valve
motion did not pass one of its criteria check points as we
excellerate the opening of the valve. It failed the compare
between the calculated position and the actual position. And
when it did that, it did like it did in the June time frame when
it switched to the redundant channel and then we shut down. So
we v> taking a look at that and we changed that out this
morning .

CUZENDO Are there indications that the lube oil was a factor

in that.

MOORE We don't think so. We have checked the lube oil.

Lube oil was sampled at the lowest point in the engines, in the
bird, I should say, My understanding was that this oil was an
order of magnitude better in part contamination that any we have
seen so far. So I wouldn't totally rule that out, but again
based on our samples, it looks pretty good.

CUZENDO So it could be a related problem?

MOORE It could be a related problem, yes. It could very

well be a related problem. We are going to take the valve back
and break it down. And it could be an internal contaminate in
the valve as well. So the parts, until we break them down and
take a look at them, we are not sure.

CUZENDO Okay, my second question has to do with the right

OMS pod on Challenger. Is there any early indications as to
whether you had a burn through on that. It looked pretty good
out there on the runway.

MOORE No, the situation on that is we have only put close

up cameras on it as I'm sure you have seen out there. As I
said, we are going to roll the bird back into the Orbital
Processing Facility, it will get back in there about 6:30 or so
this afternoon. And midnight or early tomorrow morning we will
be able to get some very close up looks at the OMS pod and make
an assessment. And I think you will get a complete debriefing on
the status... our assessments of the OMS pod on Monday when you
will hear from the team who has done the inspections and actually
have the results.

STS 41-G POST LANDING BRIEFING p!7j 12:30 PM 10/13/84 PAGE 6

KENNEDY We are going to take one more question here before

we go to Ottawa. Howard Benedict from AP

BENEDICT A couple for Jess Moore. Jess have you had a chance
to talk with any of the crew yet, and if so, what did they say.
And the second question, how tight is your November window for
getting the WESTAR vulumpus satellite.

MOORE Howard, I personnally haven't had a chance to talk

to the crew. This press conference was scheduled about the time
that the crew was suppose to arrive at the OMC building. So I
couldn't be at two places at one time. So I personnally have not
had a chance to talk to the crew. If you observed the photos of
their egress, they certainly looked like they were in good
condition when they egressed from the Orbiter into the van. And
I suspect they are all in very, very good spirits at this point
in time. Launch date in November, we are still holding, Howard,
for the seventh. We have several days of no work planned, couple
days of no work planned, I should say. We also have some
parallel time that we could do some parallel work in terms of
holding that schedule. And based on todays assessment, with roll
out planned for Wednesday night or early Thursday morning, I
think we have a good shot at that. As you know, the total window
for that mission, as we have it scheduled right, now is about
five days. So we could go between the seventh and twelfth, up to
the twelfth, I should say, of November. And you probably also
know that we have initiated burns... the satellite people have
initiated burns in bringing there orbits down on a slow
methodical bases in order to get them down to show a compatible
orbit, By about the end of this month, I believe, somewhere in
that time frame. Sc that's kind of a status. Today, I'd say I'm
optimistic about making the date on the seventh.

BENEDICT If you don't make it by the twelfth, what happens
then?

MOORE Well, if we don't make it by the twelfth, there are

other opor tunities . The opportunities kind of come around about
every 20 or so days. We have various kinds of opportunities to
make those satellites retrievals so we would take a look at the
opportunities that were presented and make schedule adjustments
as required to bring the bird down. We want to make sure that
the birds were in a reasonable orbit so that there decay rate
would not be in a point where they would be any kind of a danger
as far as coming back in at that point in time.

KENNEDY Okay, we are going to move now to the Canadian Press

in Ottawa.

VEN DEUSEN Gentlemen, Peter Van Deusen from CGOH TV in
Ottawa. What is your assessment now that the mission is
completed of Marc Garneau's performance.

STS 41-G POST LANDING BRIEFING p!7j 12:30 PM 10/13/84 PAGE 7

MOORE Marc was very busy as was the rest of the crew up

there. You know, Marc had several exper iments . . .a total of five
or so experiments that were objectives set out for him at the
outset of the mission. And my understanding is those experiments
were accomplished in good fashion, and Marc as well as the other
members of the crew, were very busy during the entire eight plus
days mission. And so, I think, obviously, Marc's performance has
been a very integral part of this overall crew, and we are very
proud of it

VEN DEUSEN Were you surprised, at all, at the level of his
training as a Canadian astronaut?

MOORE No, I wasn't surprised. I think he entered the

training program down in Houston and worked with the other crew
members. I was told and understand, he blended in quits well and
became a very dedicated member of Commander Crippen's team. And
we expected his performance to be outstanding. My understanding
is that it was, and we are very pleased

VEN DEUSEN Thank you.

KENNEDY Okay, we are moving next to the Marshall Space

Flight Center in Huntsvi3 1e.

DOOLING Dave Dooling with the Huntsville Times. Shelby,

you gave us a run down on most of the payload. What is the
status on the large format camera. How many frames do you
believe were shot on that.

TILFORD I believe over 2300 frames were shot with the large

format camera. As you know, we had programmed to take about
twice as many pictures as wo had film to do because we expected
that about 50 percent of the sites would be covered with clouds
which is just about what we run into. So, I think, in terms of
the five different kinds of films, we essentially exposed all the
film that we had, and covered most ot the primary sites that we
were interested in.

DOOLING When can we expect to see some of the photos from

that?

TILFORD Well, it's going to take about two weeks to get the

film out of the Orbiter and to Precision Optics, where the film
will be developed. We will then look at the film in some detail,
look at the quality, etc. We expect this would take somewhere
between six and nine weeks. We will then provide the data to the
principle investigators that have been selected as part of team,
and, in this same time, frame we will be issuing a release to
Commerce Business Daily looking into people/firms that might be
interested in purchasing the data in block to be consistent with

STS 41-G POST LANDING BRIEFING pl7j 12:30 PM 10/13/84 PAGE 8

the commercialization act of 1984. So we do hope to make this
data available to the public just as soon as possible.

DOOLING Okay, and on SIR-B, is there any potential Cor a

reflight in view of the short fall in the data. Any potential
for reflight before the polar orbit mission? Andy potential for
adding some kind of back up data storage possibly akin to the
film storage that was done as SIR-A.

TILFORD We are certainly looking right now. We want to sit

down and assess exactly what we have obtained with SIR-B. The
next few weeks we expect to make a decision whether to request an
additional flight of SIR-B or to proceed directly on to SIR-C
without a second flight of SIR-B. I think it will take a few
days until we look at some of the quality of the data to make
sure that we did get the kind of data that we need for the
developoment of SIR-C. So I expect that decision will be made
within the next two months. In the near time frame, we do not
expect to unmate SIR-C with the present palate to give us the
possibility, if there is an opportunity to fly, and we think we
need it, we will have that opportunity without complete
reintegration of SIR-B.

KNIGHT Tom Knight of WAFF TV. For Jess, do to the recent

restrictions imposed by the FA following the last mission did we
have any intruders in the area during approach.

MOORE Not to my knowledge. I have not heard any reports

whatsoever as far as any violators, and you know we were pretty
clean on launch as well. So I hope the restrictions that have
been publisized are doing there job, and i was very please both
the landing as well as the launch.

KNIGHT Also, Jess, the folks at Rockwell in California say

they are, quote moving ahead with the bare bones effort toward a
fifth orbiter awaiting some word possibly in January from
NASA. Can you address that?

MOORE Well, all I can say is NASA is in a sensitive

position at this point in time as we are deliberating our budget
proposal with the Office of Management and Budget, and I am not
at liberty to speak on that and until the president announces his
budget in January of 1986, I can't comment on that.

MARSHALL Okay, no further questions from Marshall

KENNEDY Okay, thank you. We are moving now to the Johnson

Space Center in Houston.

PAO

Craig Covalt

STS 41-G POST LANDING BRIEFING pl7j 12:30 PM 10/13/84 PAGE 9

COVALT I have a couple questions for Jess, and then one for

Shelby. Jess, first off during the high speed part of the roll
out there this morning, we noticed quite a lot of black smoke off
the right main gears as if he was smoking that brake very hard,
did you hear any comments on the ground personnel loops there at
Kennedy, about the right brake smoking.

MOORE Craig, I haven't received any comments on the right

brake smoking whatsoever. So I can't comment on the validity of
that at all. You may have made that observation, but I can t
place that observation to any of the factual data that I heard
regarding the roll out.

COVALT Okay, and secondly, kind of a broad question on the

overall mission, when you look across the kind of things that
effected the flight this time, I counted, I believe , three cases
of human error on the ground that primarily involved the ERBS and
TDRSS activities. Those, I realize, don't come under Shuttle
specifically, but they did affect the flight. And secondly, on
Shuttle itself, the Ku and the SIR-B, you had some relatively
small mechanisms there that, again, were not critcal flight
safety issues but did get you into a fairly severe flight
impact. Have you thought of those same kind of things and, if
so, do you think there is a message there.

MOORE Well, the message there, Craig, is what I think I

said earlier. I am very proud to have the STS crew in space with
the ability to take a look at these anomalies in-flight and to
make real time corrections. As you well know, the fact we had
the Canadian arm to pick the ERBS satellite out of the cargo bay
before releasing it on its trajectory, we were capable or able, I
should say, of allowing the solar panel hinges to warm up and
therefore the panels to come out. Had that been on an ELV, it
certainly would have been a dead cell like. So I was very glad
to have the crew on board to take a look and check that satellite
out before we released it. As far as the Ku-band antenna, again,
that's another story in the same situation. I'm very, ve*-y glad
we've got a crew on board, using there capabilities to go m and
make the best out of a situation, which could have been vey
detrimental. The fact that we were able to halt the antenna in a
given lock position allowed us to acquire the data we did on SIR-
B. And I think the crew worked very, very hard. And the OPS
people worked very, very hard to accomplish the 40 percent or so
of Sir-B data as Shelby just said. And, I think, the message is
what I said at the beginning of the discussion, Craig.

CAVALT Okay, and for Shelby, a large format camera

question. There has been a fair amount of sensitivity, I found,
among the photo people about restrictions on having some of that
material held back and actually some comments down from
headquarters to be careful on the discussion of some of the photo
areas. Is it absolutely guaranteed that 100 percent of the LFC

STS 41-G POST LANDING BRIEFING pl7j 12:30 PM 10/13/84 PAGE 10

data, after it goes through processing in Dayton, will, in fact,
be turned loose, there is no review to hold any of it back
whatsoever .

TILFORD Our plan, Craig, is to review the film for quality,

and etc., and subsequently release as much of the film as
useful. I am sure, if we find that in some cases, we might have
photographed something that has intensive national security
involvement that that will be treated on a case by case basis

PAO Paul Recer, AP

RECER For Jess Moore. Can you express in quantitative

terms the value to the flight schedule of landing at the Cape as
opposed to Edwards.

MOORE Yeah, I think we have talked about that on several

occasions. What it means is that when we land here at the Cape,
within several hours we can tow the Orbiter into the Processing
Facility and begin work on our next flight. When we land on the
west coast at Dryden, we go through the same procedures we are
doing here in terms of safing the vehicle, but we've got to bring
our 747 at Dryden, load the Orbiter on board it, and make a trip
back to Kennedy before we can begin that processing. That can
mean anywhere from 5 to 7 days in terms of a turn around flow.
And as we try to hold the schedule that was sited on many
occassions here of launching on a little greater than once a
month time frame, those 5 to 7 days are very important to us. So
it is importance for us to get the Orbiters back here into
Kennedy so we can begin that processing on the Orbiters just as
quickly as they land.

PAO Carlos Byars, Houston Chronicle

BYARS Mr. Moore, we all appreciate, of course, the work of

the crew, as you have expressed the work that the crew does in
fixing things, the IFM's on the dish antenna and particularly
that sort of thing. I'm wondering from your comments if you're
not indicating an intention to simply to continue to rely on the
astronaut crew to go ahead with these make shift operations
instead of perhaps using a little bit more, giving a little bit
more attention to these things on the ground.

MOORE Yeah, Carlos, if you are reading me in terms of

saying we shouldn't understand and try to correct whatever
problems we are seeing on the ground, you certainly misread me.
We would have liked this mission gone up and when we deployed the
Ku-band antenna operate the way the Kyu-band certainly intended
to operate. However my point is that there will be anomalies in
the flights and flexability and capability to work around
anomalies, and the fact that we have a crew up there that can
assist us in getting access to the hardware th t maybe causing

STS 41-G POST LANDING BRIEFING p!7j 12:30 PM 10/13/84 PAGE 11

the problem, I think, is a certainly extremely valuable asset in
the program. But don't get me wrong, I'm not saying we should
not go back and really understand our anomalies. Then, as you
probably know, after every flight we go through an extensive
review on all the flight anomalies and we will clearly do this on
the Ku-band antenna and the other anomalies that have been
observed on the flight. So if you were reading thai - from me, you
were reading my intentions wrong.

TILFORD I would like to add to that, if I might, please.

One objective of the Shuttle is to do experiments cheaper. And
that means that we have... are going to have to try to do things
cheaper and that means we can't do all the quality control
approaches that we would do with a free flyer when we don't get
another chance to fly an instrument. Therefore, I agree with
everything that Jess said, but, at least, from the science and
application's point of view, we look at the Shuttle as a way of
doing things that if it doesn't work 100 percent the first time
that we can go back and fix it and refly it. And so from the
point of view that, are we going to do the things the same we did
without having man aboard and without having the capability of
reflying, I think the answer is no. I expect that we are going
to have to accept some failures along the way, but in the
meantime we will be able to do experiments a whole lot cheaper.

BYARS I understand what you are saying Doctor Tilford.

The ERBS in this problem, though, I see are somewhat different
from the problems that you had with the Ku-band antenna.

TILFORD Oh, that's certainly true. And, again, we are

dealing with larger and more complicated satellites and in some
cases they are so large and so complicated that we can't do all
the internal testing that we used to with having smaller
chambers. I think we do have to look at these capabilities, but
again, with the capability of the Shuttle we have the opportunity
that if it doesn't work, we can bring it back, work on it and
send it up again.

PAO Right back here, the Houston Post

ASKERS Jim Askers with the Houston Post. Jess, have you

come to any sort of preliminary conclusions about whether having
seven people on the Shuttle is too many or too crowded?

MOORE No, I haven't gotten any formal data dumps back from

the crew or anybody else. But my observations during the course
of this mission, were that this crew worked very, very well
together. There tasks were accomplished in the times we set up
for them to be accomplished. And I think a lot of that had to go
to the dedication all the crew members had to this flight and
discipline. I know that Bob Crippen and his leadership played
into this particular flight so, I think, overall we are very

STS 41-G POST LANDING BRIEFING p!7j 12:30 PM 10/13/84 PAGE 12

pleased with the results, to date, even though I have not had a
direct debriefing on how the seven crew members on board this
bird lived for the eight and half days.

GREENWALT Frank Greenwalt, Los Angeles Daily News. For Doctor
Tilford, you mentioned a 40 percent figure with regard to SIR-
B. Can you be a little bit more specific. Did you mean 40
percent of goals or what?

TILFORD Yes, if you sit down and cut the amount of data we

got, it comes something like in terms of hours, we expected 42
hours of digital data, and eight hours of optical data. We got
the full eight hours of optical data but we only obtained nine
hours of digital data. If you want to do it terms of bytes, I
think, we expected to get something like 7 times 10 to the
twelfth bytes and in digital data we only got about one times ten
to the twlefth. In terms of scientific objectives, it really
will depend on the number of intensive flights that we plan and
those that we obtain. So I think you have to look at this in
several different ways in order to say what is its success
criteria, and it will be a few days before we are able to assess
that on 100 percent basis.

GREENWALT Can you describe, for Doctor Tilford, I assume
something will be done to the SIR-B device and the radar
antenna. Can you describe what plans you have for that in the
immediate future.

TILFORD It depends on whether we refly SIR-B or whether we

move on to the development of SIR-C. If we do refly SIR-B, I
think we will look very carefully at the locking mechanism and
the size of the motors that we have enfolding the antenna. If we
move straight forward into the development of SIR-C, as you know,
we do have to make some major changes in the antenna because we
will be looking in the SIR-C time frame and not just using one
wave length, the yellow band, which we used on SIR-B but looking
at capability of doing dual wave length, and we will be looking
at both L band and C band so there are a number of modifications
that will have to be made on the antennas before SIR-C.

PAO Julie on the Canadian Press

O'NEILL For those of us covering the first Canadian

astronaut, can you tell us something about the first steps in
readjusting to Earth and whether or not it will take Marc Garneau
longer than those longer than those who have been on an earlier
flight?

MOORE As I said earlier, I have not personnally met the

crew. They have egressed from the Orbiter and are back over in
the OMC building here at the Kennedy Space Center. I would not
expect acclimation on the part of Marc Garneau to be any longer

STS 41-G POST LANDING BRIEFING pl7j 12:30 PM 10/13/84 PAGE 13

than any of the other crew members. From what I understand, Marc
did very well in space. And as I said before, we are very proud
of his performance on this particular flight.

PAO Paul Recer

RECER It appear-', that from some of the decisions that have

been made on this flight and on the previous flight, that the
turn around and the flight schedule are developing a stronger and
stronger voice in the engineering philosophy that develops in
operational activities, can you comment on that? Is this m fact
becoming a stronger driver than it once was.

MOORE Well, let me see if I understand your point. I

think your point is that are we... maybe we are focusing too much
on the operational and launch schedule versus the engineering
correctness or engineering certification of the hardware is that
your point?

RECER I'm not making a qualitative judgement. I'm just

asking if in fact the turn around is now becoming a stronger
consideration in operational activities than it was before.

MOORE Well, it obviously has to be a very, very strong

driver in the flight schedule that we are trying to maintain.
But the turn around schedule does not drive us to compromise any
of our flight safety or flight quality. I mean, that is still
the primary objective in this program and will continue to be the
primary objective in this program. What we are trying to do now
is to learn from the experience of the 13 missions that we've
completed in this program and to plow that experience back into
our operational system so that we can officially turn this bird
around. We are essentially dealing with the same hardware, and
we ought to learn with a function of time, that hardware. And we
will know it better and better as we process this hardware. And
that experience and that learning will allow us to meet our turn
around objectives as well as the dedication of the people that
are involved in the programs. So, yeah, we are focusing on turn
around operations by the schedule we set for ourselves. By
definition there is a focus on turn around operations but not at
the sacrifice of flight safety and flight quality.

PAO

We'll take one more question here, Craig Covalt.

COVALT Actually a couple of real quick onas, Jess. On turn

around to follow your earlier question, is it your understanding
that if you are able to get 51-A off by the tenth of November,
with that date you can hold the DOD mission on December 8; and
then secondly, for 51-A is it the intent now to process .. .have
those return satellites processed at the commercial astrotech
facilty there at the Cape?

STS 41-G POST LANDING BRIEFING pl7j 12:30 PM 10/13/84 PAGE 14

MOORE Okay, Craig, with respect you your former comment,

we think we can hold the no other than December 8 date for the
DOD flight if we get off by about the tenth of November. I think
our assessment is we get off somewhere between the seventh and
tenth of November, and we will be in reasonably good shape as far
as holding the date on December 8 for the next flight of
Challenger. I have not received or heard a final word of where
those satellites are going to be processed. There waa discussion
going on of whether they would be processed here at Kennedy or
whether they would be processed at the astrotech facility, but I
do not have a final word on what decision has been made on those
satellites .

PAO And that's all the questions from here at JSC

KENNEDY Okay, we will take just a few questions back here at

Kennedy Space Center, beginning with Hike Meechum, GNET

MEECHUM Follow up a little bit on what Craig said. I'm

trying to understand the driver here as far as the DOD mission.
If you start to slip for some reason in the 51-A mission, at what
point or is there a point where you say we have to not go with
this mission so we can get the DOD mission, or is that a criteria
there .

MOORE All we are saying is that if we are unable to get 51

out or off between the time of like November 7 and November 10,
we will probably move day for day the DOD launch date, which we
have now sighted as no earlier than December 8. Which would mean
if we get off the eleventh of November, we will probably launch
the DOD flight on the ninth of December. So thats the kind of
cycle we are looking at right now.

MEECHUM And how long of a window can you afford on that DOD

mission .

MOORE I don't know what the exact window is. We have got

several days so that launch window, to me, is not a concern as
far as that December time frame right now. I'm not very
concerned about the December window. I'm more concerned about
the November window where we have got about five days during that
period to pick those satellites up.

KENNEDY Sue Butler Hanison - Time Magazine

HAN I SON For just some more please. Besides saving five to

seven days by landing here, could you give us a realistic dollar
figure on how much we save as NASA and a taxpayer.

MOORE Well, a taxpayer certainly saves sometime, but I

can't give you a calculated dollar figure. I can just tell you
that we then don't have to send the crews out to do all the final

STS 41-G POST LANDING BRIEFING pl7j 12:30 PM 10/13/84 PAGE 15

processing, and I don't have a set of dollars that I can rack up
and say it cost x million of dollars or x hundred thousand of
dollars in terms of landing here versus landing out on the west
coast, but it obviously saves times.

KENNEDY Wait for the mike

HAN I SON Sorry, some way we can calculate man's power

MOORE I'm sure it has been calculated, I just do not have

those figures.

HAN I SON Who could give us those figures.

MOORE Well, I'm sure that we could get some data from the

Kennedy Space Center here, and we at headquarters would probably
be the ones to make those calculations. I'm sure thpy have been
done, I just don't have those figures in my mind.

KENNEDY Harry Cocum - Aviation Week

COCUM A Jess, did the head work, did the toilet work this

time?

MOORE Yes, as far as we know, it worked fine, and also we

did not get any ice on this particular mission. As you know, we
implemented some slightly modified procedures on this time, and
wa were watching the water dumps with the TV cameras and so
forth. One of the things I want to add while I have the
microphone here. We have talked a lot about the SIR-B, and we
talked about the ERBSs, and we also talked a lot about the file
and maps experiment on board and Canadian experiments. I want to
say a couple of words about the Orbiter refueling experiment
onboard. The thing we did the EVA with yesterday with David and
Kathy Sullivan. My indications is that worked exceedingly well,
and, I think, I told this group of you prior to the launch of
this flight, that I thought would be one of the extremely
important tools for us to use in the future, the ability to
refuel satellites. And I think the demonstration that we can
successfully transfer fuel on orbit, from one tank to another is
a major step towards accomplishing that. And I see that being a
part of satellite design in the future, and I think this
experiment has gone exceedingly well. And we are very pleased at
the entire operation from the in-cabin operation to the cargo bay
operation with the EVA, demonstrated those objectives can be
met. We are very, very proud of that experiment as well.

KENNEDY If there is no additional questions, then we will

wind this up. There will be an Orbiter status briefing on Monday
at 11 a.m. with the 41-G flow director, Jim Harrington. The
reason for moving this from normal time of Sunday to Monday is
that here at the Kennedy Space Center the processing goes a

STS 41-G POST LANDING BRIEFING p!7j 12:30 PM 10/13/84 PAGE 16

little differently than out at Dryden. We have to keep the OPS
clear during the time that we are working with draining
propellents and etc., and so that we will not be getting into
look at the things that you were interested in until very late
tomorrow or Monday morning. So we will have that briefing will
be on Monday, we will be closed tomorrow. Okay, thank you very
much for now, and I'll take questions after.

END OF TAPE

■■'/ ■ «: •

L

STS 41-G TDRS BRIEFING 2 P.M. JSC 10/9/84 P14J PAGE 1

ROBERT SPEARING This is Robert Spearing from Goddard Space
Flight Center. I'd like to bring you up to date on the events
that occurred as a result of the spacecraft, TDRS spacecraft
upset th<*t we had yesterday. At about 12:40 zula time yesterday,
theit'e Grench time, we experiaced a spacecraft anomaly that
appeared as an attitude control upset. The process that followed
from that involved a reconfiguration of the spacecraft to
reestablish a control mode which would allow us to recover to our
normal attitude control mode. That process requires that we go
to a sun mode acquisition for the control system which takes off
the Earth for sure although we have started off the Earth as a
result of the upset, and requires and fair amount of time for us
to get back to a point where we can see the Earth again in the
ERBS sensors, That process was an orderly one which resulted in
a recovery of the spacecraft platform to its normal mode where we
can communicate at about 20 - 40 Z with full recovery and
communications restored to Shuttle at just after midnight zulu
time. Accounting for about a 12 hour total period of outage from
TDRS. Do you have any questions at this time?

CHARLES REDMOND This is Robert E. Spearing. He is the
Associate Chief Networks at Goddard Space Flight Center in
Greenville, Maryland.

This is Goddard. Do you have any questions at this time?

KSC has questions.

Go ahead.

BILL HINES (Chicago Sun Times) Okay, we have the spacecraft
and nominally the attitude control was upset. We were informed
yesterday that this was some kind of a cosmic hit. We were told
today about an operational something. What caused it?

This is Goddard. We still can not hear anything from KSC. I
just heard your last but I can't hear the questions.

BILL HINES (Chicago Sun Times) My question was that we know
now about the spacecraft anominaly being upset and all that. We
were told yesterday when it first developed that it was a cosmic
hit. Today we were told something about an operational
failure. What caused it?

If it is necessary wo can relay that question through here if
they can hear us.

SPEARING Yes, we can hear you.

Okay, can you still here me?
SPEARING Negative. Very low down.

STS 41-G TDRS BRIEFING 2 P.M. JSC 10/9/84 P14J PAGE 2

Can you hear me now?

SPEARING Yes. That's good,

The question from Kennedy was from Bill Hines of the Chicago
Sun Times and his question was yesterday we were told the
spacecraft suffered a cosmic hit. Today we're toid there was an
operational error. What caused the spacecraft to cio down?

SPEARING The actual cause was moon intrusion into the field of
view of the Earth sensor on the spacecraft.

HINES Yesterday's (garble).

SPEARING Normally that event would be precluded by switching
from the Earth's sensor that is active to the other Earth
sensor. In this case we have two, one i?. called the north sensor
and the other the south sensor. The south sensor was active and
the moon came into the field of view of that sensor. Normally we
would have switched to the north 3ensor to preclude that. That
action did not take place however, the exact reasons and the
events leading up to why that action didn't take place are being
reviewed at White Sands as we talk. We do not have the full
story on that at this time and we'll be in a position to give you
more information as soon as that review process is complete.

HINES Including the things that you are looking at at White
Sands, are you also looking at the possibility that some
individual may have done something or left something undone that
caused this. Is this what you mean by operational error?

SPEARING Yes, we're looking at all the possibilities for causes
of this including whether the operators in fact did the right
thing at the right time.

JOEL PENIS (WNYC New York) When the error first occurred
yesterday, apparently the people in Houston were informed that
the system would be back up in a short time. But you said that
the process of reacquiring the sun sensor and then reacquiring
the earth sensor is a protracted process. Why was that not known
immediately?

SPEARING The reason that was not knowing it first was that the
initial indications that we were getting as a result of this
upset were that they may in fact have been caused by ei ram hit as
we've called it. This is a phenomena caused by cosmic ray
impacting the spacecraft and the ram is associated with the
attitude control system. That was not the case. Normally we
recover from a ram hit in a period of less than 10 minutes. With
this particular upset that process is not valid and therefore
took a lot longer.

LEE HUBBS (Atlantic Constitution) Can you tell us how long

STS 41-G TDRS BRIEFING 2 P.M. JSC 10/9/84 P14J PAGE 3

that review at White Sands will take and when it will be
completed?

SPEARING We expect it to take several days. It involves
interviewing all the people that were involved at the time and
locking over all the telemetry logs that were taken which would
contain all the information regarding the actual status of the
commands going to the Spacecraft and information from the
spacecraft relative to what it was doing in the process of this
upset. We expect that it may take us as long as the end of the
week before we have a good feeling as to the full cause of this
problem.

HUBBS Okay, given that you at least have some sense of the
partial causes of this problem I mean, I'm sure you have made a
preliminary pass through the data. What's your best theory at
the moment to what caused this?

SPEARING Well, as I indicated earlier, it appears that the
command ho switch sensors was not sent, so that's the root cause
of the problem.

HINES Hines again, just for clarification on the use of this
word ram jet. The only context that I know ram jet in is
aeronautical one where it is sort of a as I understand it, a
hypersonic shock wave inside an engine. Can you put this into
context of what you're talking about - interplanetary space?

SPEARING Let me correct the term for you probably because of
the communications hook up here it didn't come through the way it
should of. The word is ram hit. The ram is a random access
memory that's part of an onboard attitude control processor on
the TDRSS.

HINES Okay, I understand, thank you.

Any more question here? No more question here at KSC.

PAO We hav.? questions here at Johnson. Mike Meecham, Gannet
News Service ,

MIKE MEECHAM (Gannet News Service) I'm not sure I understand
exactly how the moon figures in this please. Can you go over
again how the moon intrusion works?

SPEARING Okay, I'll try as best I can over the audio line. If
you could invision the fact that the satellite sitting at
synchronous altitude U essentially oriented so that it has a
sensor looking at the earth and in particular looking for the
edges of the Earth to determine where the center is. You have
the scenario that would normally take place. In other words, we
normally look for the edges of the earth to determine that we re
pointed at the center of the earth. The f ield-of-view of this
scanner thats looking for the edges of the earth is such that it

STS 41-G TDRS BRIEFING 2 P.M. JSC 10/9/84 P14J PAGE 4

extends beyond the edge a fair amount. When the moon comes into
the f ield-of-view of this sensor it essentially establishes
another edge tor the earth making the processor believe that it
sees an earth that is larger, for one thing, and who's center is
offset from the real earth. Since the processor requires that
the spacecraft stay pointed at the center of the earth we moved
off essentially from our earth pointing position to a new
position off the earth and that caused the upset.

MEECHAM So the point of switching to those different sensors
was in essence to tell the machine ignore the moon.

SPEARING Well, let me explain. There are two earth sensors
onboard. One is a south sensor and the other is a north
sensor. In this case, the moon was coming by within the f ield-
of-view of the south sensor. Had the switch been made to the
north sensor at the appropriate time, the process of the moon
coming across the f ield-of-view of the south sensor would have
been ignored.

LEE DYE (Los Angeles Times) This switching that has to be
done. That's something that has to be done manually? It's not
something that normally occurs by computer advanced programming?

SPEA3ING It's not done automatically. The process of
determining when these intrusions occur is done using computer
process. But the actual sending of the command is a manual
process .

CRAIG CO-VAULT (Aviation Week) Bob, we did not hear due to the
audio problems your first opening statement. Could you please
repeat how far the spacecraft itself perhaps pitched or rolled
offline and secondly, was the spacecraft ever at risk?

SPEARING The spacecraft was not at risk. It did go into a
roll. Once it lost the earth that had a period of about 16
minutes. That's fairly a slow roll.

COVAULT Okay, and a last question, have you ever experienced in
the course of TDRSS any significant activity like this upset
before?

SPEARING Not a significant as this one. We - I think I
mentioned earlier, we have taken RAM hits before which manifest
themselves in the upset of the attitude control system. But that
process is well understood and recovery from that is very
quick. An upset of this magnitude we haven't seen in the past.

FRANK GREENWALT (Los Angeles Daily News) I want to make
absolutely sure. I take it your completely ruling out any
cosmic ay hits having any effect whatsoever on the TDRSS?

SPEARING Not at this time. We rule it out as the root cause
but since we've received these hits on a routine basis we can't

STS 41-G TDRS BRIEFING 2 P.M. JSC 10/9/84 P14J PAGE 5

rule out the fact that it might have been an extenuating
circumstance.

GREENWALT I'm sorry. You mean it may have (garble) some
preferrable part in this period to disturb the programming that
would have lead to command being sent? Is that - I didn't quite
follow.

SPEARING No, what I'm saying is the root cause, we're pretty
sure, was the moon intrusion. However, we don't want to rule out
any other extenuating circumstances until we've had a chance to
look at all the information.

GREENWALT Yes, and also the command is sent some human, White
Sands sends the command manually after receiving a signal from
the satellite. I was unclear about that.

SPEARING No, doesn't require a signal from the satellite. We
predict in advance when the moon intrusion should occur. The
command is cued and is sent by an operator.

GREENWALT So that would indicate somebody didn't get the
information to send the command, I assume.

SPEARING Yes, exactly what that cause was though we're not
sure. We have to wait until the review people at the White Sands
station go through the process and get back to us.

PAUL RECER (Associated Press) Well, to go a step further, was
that manual signal never sent or was it sent and not received?

SPEARING As far as we can tell it was not sent.

RECER Is there only one operator that is charged with the
responsibility of sending that information.

SPEARING Negative.

RECER So there's not one, there must be two or more. How many
do monitor that sending of the information?

SPEARING Normally it's two. In other words we use a one over
one process to make sure that the command is being sent or the
appropriate ones.

RECER Okay, so you have two people charged with that
responsibility and neither one of them stent the signal?

SPEARING That's correct.

MIKE MEECHAM You did loose the entire memory. We can
characterize that as you lost the memory of the TDRSS, the
onboard memory?

STS 41-G TDRS BRIEFING 2 P.M. JSC 10/9/84 P14J PAGE 6

SPEARING No, the condition of the memory was not such that we
lost it. The problem that we ran into was that in loosing our
Earth reference, we no longer had a reference to provide an input
to our control system to tell it exactly where to point.

MEECHAM Getting back to the question of the time period here.
Oriqinally it appeared like this was going to be a two hour
problem arid it stretched into 12 hours. When the word was sent
that it was a two hour problem was that because you were working
under the assumption that it had been a cosmic hit?

SPEARING That's correct.

MEECHAM Okay. And the extension of that time was simply that
it was a much more serious problem than you had originally had
expected?

SPEARING That's correct.

MEECHAM Okay. And to take the full 12 hours was then a process
it took that long to reorient the spacecraft to the earth center?

SPEARING Yes. And that's not something that you can speed
up. You have to wait for the Earth to come into the field-of-
view and that happens at worst once every 12 hours.

MEECHAM And this is a matter of firing a small RCS hydrazine
jets aboard the TDRSS?

SPEARING Yes, that's part of the process of recovery to
reorient the spacecraft.

MEECHAM Thank you.

JIM ASKER (Houston Post) A couple of questions on the
personnel flow with the order that was suppose to have gone to
the satellite. Was there someone or some people who are suppose
to tell the two operators that they need to send the ordern up so
could it involve more than just these two operators making an
error?

SPEARING There is a process that involves a number of people
including deorbit determination people. Exactly where that
process broke down we don't know.

ASKER Is H likely that someone's going to get fired over this
incident?

SPEARING I'm not in a position to discuss that or comment on
it. I don't know.

CARLOS BYARS (Houston Chronicle) I'm wondering about the
effect on TDRSS and it's gas supply. How much gas this
recovery operation use up and will it significantly effect the

STS 41-G TDRS BRIEFING 2 P.M. JSC 10/9/84 P14J PAGE 7

life of the TDRSS?

SPEARING I don't have any exact figures for you but I can say
that based on the type of process that we went through, very
little gas was used and it shouldn't have any effect on the life
time of the satellite. At least from a reaction control system
point of view. We had more than enough gas remaining to carry us
through the full life of the vehicle and before this event and
based on the type of maneuvers that we conducted the amount of
gas used I'm sure was small.

BYARS Was the command to switch the centers, the command that
was not sent. Was it - have you determined whether or not it was
ever compared and cued up?

SPEARING To our knowledge the command was prepared whether it
was actually cued up, we don't know at this time.

PAUL RECER How long from the point that the trouble started was
it till you determined it was a result of the slow roll and
result of a, possibly the result of the lunar intrusion?

SPEARING Our team hear at Goddard got that information fairly
late in the day. We're trying to determine now how soon that
information was available at the White Sands Facility. We really
can't pin that down at this point in time.

RECER Okay, what I'm really driving at is how long in that 12
to 14 hours were you working under the impression that it could
have been a ram hit?

SPEARING Personally I believe I was working under the
assumption that it was a ram hit for a good 6 hours.

RECER Okay, it was after that six hour period that we were told
it was coming up on the next rev, and the rev after that and rev
after that. Did you know at that point that it was going to
await the alignment with the Earth?

SPEARING Yes.

RECER Then why weren't we told that they was expected up within
the next rev or the rev afuer that? We were given a series of
statements that it was due up shortly and most of which proved to
be false.

SPEARING Well, I can't comment on that specifically. I know
that at the point that we locked onto the sun, that the process
from there on is one that requires waiting for the Earth to come
into the field-of-view and that's a pretty good - pretty much a
predetermined amount of time.

RECER And you knew that in six hours?

STS 41-G TDRS BRIEFING 2 P.M. JSC 10/9/84 P14J PAGE 8

SPEARING Yes.

RECER Why weren't we told?

SPEARING I really don't have the answer.

CRAIG COVAULT A couple of questions. Had Goddard been able to
determine earlier than six hours into the event that it was a
lunar intrusion, could Goddard have helped rectify the situation
earlier?

SPEARING No. Once that was determined you'd have to go through
the same process that we went through.

COVAULT So the key really is how soon White Sands understood
that it in fact was a lunar intrusion?

SPEARING Would you repeat the question?

COVAULT So that the key point on that type of question is how
soon the White Sands personnel were able to determine it was an
intrusion of the moon?

SPEARING That's correct. And we're trying to pin that down
there through this review process.

COVAULT And one last question. Is the staffing, the technical
staff at White Sands, is that spacecomm or is that TRW?

SPEARING We have technical people from spacecomm and TRW at the
site.

COVAULT Do you know specifically which staff was involved with
this activity?

SPEARING The management team down there is spacecomm. The
exact folks that were in the room at the time of the incident,
I'm not familiar with.

PAO Okay, lets just have two more questions here at Houston.
Prank Greenwalt.

FRANK GREENWALT I think I'm hearing you say that you're pretty
well determined as human error but you don't know just how this
human error took place and what extenuating circumstances might
have been in effect. Am I correct or am I jumping to
conclusions?

SPEARING Well from the standpoint that the command was not
sent, you're correct.

GREENWALT And I'm also trying to figure out what you mean ray
extenuating circumstances. I was asking about the cosmic ray hit
and you said you hadn't excluded that possibility from

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extenuating circumstances. How could such a thing be an
extenuating circumstance on a human here?

SPEARING Not on that but from the standpoint of how we went
through the recovery process. When we look at these events we
don't just look at the cause, we look at how we recovered. And
looking at that we want to be sure that there weren't other
events occurred during the process of this major event that could
have affected our ability to recover.

GREENWALT I see, so conceivably a cosmic ray hit could have
delayed your recovery efforts. That's the only connection?

SPEARING Yes. It's a remote possibility but we want to look at
all the information,

GREENWALT And the review process will determine what? Who made
the - who failed to send the command or who failed to give
instructions to send the command or -

SPEARING - or wh&t processes might have been in place that
could have prevented the process, this particular command from
being sent? What the sequence of events were and you know what
extenuating circumstances might have been involved in the command
not being sent.

PAO Okay, the last question in Houston will be from Paul Recer.

PAUL RECER Okay, the two operators who were supposed to have
responded to the possible or the potential lunar intrusion, were
they TRW employees or were they spacecomm employees?

SPEARING I believe the satellite controllers is spacecomm
employees .

RECER Okay, thank you.

PAO Any further questions? All right gentlemen, thank you very
much for your time.

END OF TAPE